64784076 has 72 divisors (see below), whose sum is σ = 186214896. Its totient is φ = 17418240.

The previous prime is 64784039. The next prime is 64784081. The reversal of 64784076 is 67048746.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6756 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (2586318).

Almost surely, 2^64784076 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 64784076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93107448).

64784076 is an abundant number, since it is smaller than the sum of its proper divisors (121430820).

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

64784076 is a wasteful number, since it uses less digits than its factorization.

64784076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519 (or 6510 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 64784076 is about 8048.8555708250. The cubic root of 64784076 is about 401.6268659641.

The spelling of 64784076 in words is "sixty-four million, seven hundred eighty-four thousand, seventy-six".