64403718 has 16 divisors (see below), whose sum is σ = 136384560. Its totient is φ = 20205056.

The previous prime is 64403707. The next prime is 64403719. The reversal of 64403718 is 81730446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315603 + ... + 315806.

It is an arithmetic number, because the mean of its divisors is an integer number (8524035).

Almost surely, 2^64403718 is an apocalyptic number.

64403718 is an abundant number, since it is smaller than the sum of its proper divisors (71980842).

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

64403718 is a wasteful number, since it uses less digits than its factorization.

64403718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631431.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 64403718 is about 8025.1927079666. The cubic root of 64403718 is about 400.8393168031.

The spelling of 64403718 in words is "sixty-four million, four hundred three thousand, seven hundred eighteen".