64630836 has 36 divisors (see below), whose sum is σ = 164482500. Its totient is φ = 21397248.

The previous prime is 64630831. The next prime is 64630847. The reversal of 64630836 is 63803646.

64630836 is a `hidden beast` number, since 646 + 3 + 0 + 8 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24561936 + 40068900 = 4956^2 + 6330^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64630836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64630831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 661 + ... + 11388.

Almost surely, 2^64630836 is an apocalyptic number.

It is an amenable number.

64630836 is an abundant number, since it is smaller than the sum of its proper divisors (99851664).

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

64630836 is a wasteful number, since it uses less digits than its factorization.

64630836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12208 (or 12203 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 64630836 is about 8039.3305691457. The cubic root of 64630836 is about 401.3099470803.

The spelling of 64630836 in words is "sixty-four million, six hundred thirty thousand, eight hundred thirty-six".