64057890 has 32 divisors (see below), whose sum is σ = 165566016. Its totient is φ = 15768000.

The previous prime is 64057849. The next prime is 64057907. The reversal of 64057890 is 9875046.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 81736 + ... + 82515.

It is an arithmetic number, because the mean of its divisors is an integer number (5173938).

Almost surely, 2^64057890 is an apocalyptic number.

64057890 is an abundant number, since it is smaller than the sum of its proper divisors (101508126).

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

64057890 is a wasteful number, since it uses less digits than its factorization.

64057890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164274.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 64057890 is about 8003.6173071930. The cubic root of 64057890 is about 400.1205678215.

The spelling of 64057890 in words is "sixty-four million, fifty-seven thousand, eight hundred ninety".