64057540 has 24 divisors (see below), whose sum is σ = 134695512. Its totient is φ = 25589760.

The previous prime is 64057537. The next prime is 64057571. The reversal of 64057540 is 4575046.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28987456 + 35070084 = 5384^2 + 5922^2 .

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, 18852 + ... + 21988.

It is an arithmetic number, because the mean of its divisors is an integer number (5612313).

Almost surely, 2^64057540 is an apocalyptic number.

It is an amenable number.

64057540 is an abundant number, since it is smaller than the sum of its proper divisors (70637972).

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

64057540 is a wasteful number, since it uses less digits than its factorization.

64057540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 64057540 is about 8003.5954420498. The cubic root of 64057540 is about 400.1198390929.

The spelling of 64057540 in words is "sixty-four million, fifty-seven thousand, five hundred forty".