64406738 has 32 divisors (see below), whose sum is σ = 109892160. Its totient is φ = 28042560.

The previous prime is 64406729. The next prime is 64406743. The reversal of 64406738 is 83760446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99845 + ... + 100487.

It is an arithmetic number, because the mean of its divisors is an integer number (3434130).

Almost surely, 2^64406738 is an apocalyptic number.

64406738 is a deficient number, since it is larger than the sum of its proper divisors (45485422).

64406738 is a wasteful number, since it uses less digits than its factorization.

64406738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 64406738 is about 8025.3808632363. The cubic root of 64406738 is about 400.8455820512.

The spelling of 64406738 in words is "sixty-four million, four hundred six thousand, seven hundred thirty-eight".