63679420 has 72 divisors (see below), whose sum is σ = 156854880. Its totient is φ = 21651840.

The previous prime is 63679409. The next prime is 63679423. The reversal of 63679420 is 2497636.

It is a self number, because there is not a number n which added to its sum of digits gives 63679420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63679423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177201 + ... + 177559.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^63679420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63679420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78427440).

63679420 is an abundant number, since it is smaller than the sum of its proper divisors (93175460).

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

63679420 is a wasteful number, since it uses less digits than its factorization.

63679420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 63679420 is about 7979.9385962550. The cubic root of 63679420 is about 399.3310067438.

The spelling of 63679420 in words is "sixty-three million, six hundred seventy-nine thousand, four hundred twenty".