64293920 has 48 divisors (see below), whose sum is σ = 152432280. Its totient is φ = 25626624.

The previous prime is 64293917. The next prime is 64293923. The reversal of 64293920 is 2939246.

It is an interprime number because it is at equal distance from previous prime (64293917) and next prime (64293923).

It can be written as a sum of positive squares in 4 ways, for example, as 58553104 + 5740816 = 7652^2 + 2396^2 .

It is not an unprimeable number, because it can be changed into a prime (64293923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61724 + ... + 62756.

Almost surely, 2^64293920 is an apocalyptic number.

It is an amenable number.

64293920 is an abundant number, since it is smaller than the sum of its proper divisors (88138360).

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

64293920 is a wasteful number, since it uses less digits than its factorization.

64293920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 64293920 is about 8018.3489572355. The cubic root of 64293920 is about 400.6113983374.

The spelling of 64293920 in words is "sixty-four million, two hundred ninety-three thousand, nine hundred twenty".