64867944 has 32 divisors (see below), whose sum is σ = 162616320. Its totient is φ = 21563136.

The previous prime is 64867931. The next prime is 64867967. The reversal of 64867944 is 44976846.

It is a junction number, because it is equal to n+sod(n) for n = 64867893 and 64867902.

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, 5664 + ... + 12720.

It is an arithmetic number, because the mean of its divisors is an integer number (5081760).

Almost surely, 2^64867944 is an apocalyptic number.

It is an amenable number.

64867944 is an abundant number, since it is smaller than the sum of its proper divisors (97748376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64867944 is a wasteful number, since it uses less digits than its factorization.

64867944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7449 (or 7445 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 64867944 is about 8054.0638189674. The cubic root of 64867944 is about 401.8001035823.

The spelling of 64867944 in words is "sixty-four million, eight hundred sixty-seven thousand, nine hundred forty-four".