64620736 has 28 divisors (see below), whose sum is σ = 129865120. Its totient is φ = 31898880.

The previous prime is 64620733. The next prime is 64620739. The reversal of 64620736 is 63702646.

It is an interprime number because it is at equal distance from previous prime (64620733) and next prime (64620739).

It is not an unprimeable number, because it can be changed into a prime (64620733) 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, 1335 + ... + 11446.

It is an arithmetic number, because the mean of its divisors is an integer number (4638040).

Almost surely, 2^64620736 is an apocalyptic number.

It is an amenable number.

64620736 is an abundant number, since it is smaller than the sum of its proper divisors (65244384).

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

64620736 is a wasteful number, since it uses less digits than its factorization.

64620736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872 (or 12862 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 64620736 is about 8038.7023828476. The cubic root of 64620736 is about 401.2890414679.

It can be divided in two parts, 64620 and 736, that added together give a palindrome (65356).

The spelling of 64620736 in words is "sixty-four million, six hundred twenty thousand, seven hundred thirty-six".