64787456 has 44 divisors (see below), whose sum is σ = 130680480. Its totient is φ = 32102400.

The previous prime is 64787453. The next prime is 64787467. The reversal of 64787456 is 65478746.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64787456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64787453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154415 + ... + 154833.

Almost surely, 2^64787456 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 64787456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65340240).

64787456 is an abundant number, since it is smaller than the sum of its proper divisors (65893024).

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

64787456 is a wasteful number, since it uses less digits than its factorization.

64787456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 572 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 64787456 is about 8049.0655358246. The cubic root of 64787456 is about 401.6338505776.

The spelling of 64787456 in words is "sixty-four million, seven hundred eighty-seven thousand, four hundred fifty-six".