64397138 has 16 divisors (see below), whose sum is σ = 104279616. Its totient is φ = 29649360.

The previous prime is 64397119. The next prime is 64397147. The reversal of 64397138 is 83179346.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64397095 and 64397104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8723 + ... + 14313.

It is an arithmetic number, because the mean of its divisors is an integer number (6517476).

Almost surely, 2^64397138 is an apocalyptic number.

64397138 is a deficient number, since it is larger than the sum of its proper divisors (39882478).

64397138 is a wasteful number, since it uses less digits than its factorization.

64397138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6049.

The product of its digits is 108864, while the sum is 41.

The square root of 64397138 is about 8024.7827384921. The cubic root of 64397138 is about 400.8256653525.

The spelling of 64397138 in words is "sixty-four million, three hundred ninety-seven thousand, one hundred thirty-eight".