63423540 has 96 divisors (see below), whose sum is σ = 200376960. Its totient is φ = 16651008.

The previous prime is 63423533. The next prime is 63423541. The reversal of 63423540 is 4532436.

63423540 is a `hidden beast` number, since 634 + 23 + 5 + 4 + 0 = 666.

63423540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63423540² = 8045090852263200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63423541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35304 + ... + 37056.

It is an arithmetic number, because the mean of its divisors is an integer number (2087260).

Almost surely, 2^63423540 is an apocalyptic number.

63423540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63423540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100188480).

63423540 is an abundant number, since it is smaller than the sum of its proper divisors (136953420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63423540 is a wasteful number, since it uses less digits than its factorization.

63423540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 63423540 is about 7963.8897531294. The cubic root of 63423540 is about 398.7954177621.

Adding to 63423540 its reverse (4532436), we get a palindrome (67955976).

The spelling of 63423540 in words is "sixty-three million, four hundred twenty-three thousand, five hundred forty".