64738478 has 32 divisors (see below), whose sum is σ = 117258240. Its totient is φ = 26218080.

The previous prime is 64738477. The next prime is 64738483. The reversal of 64738478 is 87483746.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64738477) 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 in 15 ways as a sum of consecutive naturals, for example, 16928 + ... + 20396.

It is an arithmetic number, because the mean of its divisors is an integer number (3664320).

Almost surely, 2^64738478 is an apocalyptic number.

64738478 is a deficient number, since it is larger than the sum of its proper divisors (52519762).

64738478 is a wasteful number, since it uses less digits than its factorization.

64738478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552.

The product of its digits is 903168, while the sum is 47.

The square root of 64738478 is about 8046.0224956186. The cubic root of 64738478 is about 401.5326160535.

The spelling of 64738478 in words is "sixty-four million, seven hundred thirty-eight thousand, four hundred seventy-eight".