40432857 has 16 divisors (see below), whose sum is σ = 55376640. Its totient is φ = 26227152.

The previous prime is 40432853. The next prime is 40432879. The reversal of 40432857 is 75823404.

It is not a de Polignac number, because 40432857 - 2² = 40432853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40432853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48478 + ... + 49304.

It is an arithmetic number, because the mean of its divisors is an integer number (3461040).

Almost surely, 2^40432857 is an apocalyptic number.

It is an amenable number.

40432857 is a deficient number, since it is larger than the sum of its proper divisors (14943783).

40432857 is a wasteful number, since it uses less digits than its factorization.

40432857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 40432857 is about 6358.6835901781. The cubic root of 40432857 is about 343.2243911328.

The spelling of 40432857 in words is "forty million, four hundred thirty-two thousand, eight hundred fifty-seven".