63253440 has 112 divisors (see below), whose sum is σ = 223174560. Its totient is φ = 16865280.

The previous prime is 63253417. The next prime is 63253441. The reversal of 63253440 is 4435236.

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 (63253441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4980 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (1992630).

Almost surely, 2^63253440 is an apocalyptic number.

63253440 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 63253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111587280).

63253440 is an abundant number, since it is smaller than the sum of its proper divisors (159921120).

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

63253440 is a wasteful number, since it uses less digits than its factorization.

63253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347 (or 7331 counting only the distinct ones).

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

The square root of 63253440 is about 7953.2031282999. The cubic root of 63253440 is about 398.4385795126.

Adding to 63253440 its reverse (4435236), we get a palindrome (67688676).

The spelling of 63253440 in words is "sixty-three million, two hundred fifty-three thousand, four hundred forty".