40297864 has 8 divisors (see below), whose sum is σ = 75558510. Its totient is φ = 20148928.

The previous prime is 40297853. The next prime is 40297867. The reversal of 40297864 is 46879204.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 4656964 = 5970^2 + 2158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40297867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2518609 + ... + 2518624.

Almost surely, 2^40297864 is an apocalyptic number.

It is an amenable number.

40297864 is a deficient number, since it is larger than the sum of its proper divisors (35260646).

40297864 is a wasteful number, since it uses less digits than its factorization.

40297864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037239 (or 5037235 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 40297864 is about 6348.0598610914. The cubic root of 40297864 is about 342.8419913278.

The spelling of 40297864 in words is "forty million, two hundred ninety-seven thousand, eight hundred sixty-four".