64718830 has 64 divisors (see below), whose sum is σ = 137308608. Its totient is φ = 21698560.

The previous prime is 64718783. The next prime is 64718831. The reversal of 64718830 is 3881746.

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 64718830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64718831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98784 + ... + 99436.

It is an arithmetic number, because the mean of its divisors is an integer number (2145447).

Almost surely, 2^64718830 is an apocalyptic number.

64718830 is an abundant number, since it is smaller than the sum of its proper divisors (72589778).

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

64718830 is a wasteful number, since it uses less digits than its factorization.

64718830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 64718830 is about 8044.8014270086. The cubic root of 64718830 is about 401.4919904917.

The spelling of 64718830 in words is "sixty-four million, seven hundred eighteen thousand, eight hundred thirty".