64115444 has 12 divisors (see below), whose sum is σ = 117080544. Its totient is φ = 30663864.

The previous prime is 64115437. The next prime is 64115497. The reversal of 64115444 is 44451146.

It is a super-2 number, since 2×64115444² = 8221580318634272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348362 + ... + 348545.

It is an arithmetic number, because the mean of its divisors is an integer number (9756712).

Almost surely, 2^64115444 is an apocalyptic number.

It is an amenable number.

64115444 is a deficient number, since it is larger than the sum of its proper divisors (52965100).

64115444 is a wasteful number, since it uses less digits than its factorization.

64115444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696934 (or 696932 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 64115444 is about 8007.2119991917. The cubic root of 64115444 is about 400.2403638674.

The spelling of 64115444 in words is "sixty-four million, one hundred fifteen thousand, four hundred forty-four".