64351438 has 4 divisors (see below), whose sum is σ = 96527160. Its totient is φ = 32175718.

The previous prime is 64351433. The next prime is 64351439. The reversal of 64351438 is 83415346.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×64351438² = 8282215145335688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64351433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16087858 + ... + 16087861.

It is an arithmetic number, because the mean of its divisors is an integer number (24131790).

Almost surely, 2^64351438 is an apocalyptic number.

64351438 is a deficient number, since it is larger than the sum of its proper divisors (32175722).

64351438 is a wasteful number, since it uses less digits than its factorization.

64351438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32175721.

The product of its digits is 34560, while the sum is 34.

The square root of 64351438 is about 8021.9348040233. The cubic root of 64351438 is about 400.7308264187.

The spelling of 64351438 in words is "sixty-four million, three hundred fifty-one thousand, four hundred thirty-eight".