64700730 has 24 divisors (see below), whose sum is σ = 168222132. Its totient is φ = 17253504.

The previous prime is 64700729. The next prime is 64700743. The reversal of 64700730 is 3700746.

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 3250809 = 7839^2 + 1803^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64700694 and 64700703.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359359 + ... + 359538.

Almost surely, 2^64700730 is an apocalyptic number.

64700730 is an abundant number, since it is smaller than the sum of its proper divisors (103521402).

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

64700730 is a wasteful number, since it uses less digits than its factorization.

64700730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718910 (or 718907 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 64700730 is about 8043.6763982647. The cubic root of 64700730 is about 401.4545584049.

The spelling of 64700730 in words is "sixty-four million, seven hundred thousand, seven hundred thirty".