40395957 has 32 divisors (see below), whose sum is σ = 65356800. Its totient is φ = 21679488.

The previous prime is 40395931. The next prime is 40395959. The reversal of 40395957 is 75959304.

It is not a de Polignac number, because 40395957 - 2¹⁰ = 40394933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40395959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54294 + ... + 55032.

It is an arithmetic number, because the mean of its divisors is an integer number (2042400).

Almost surely, 2^40395957 is an apocalyptic number.

It is an amenable number.

40395957 is a deficient number, since it is larger than the sum of its proper divisors (24960843).

40395957 is a wasteful number, since it uses less digits than its factorization.

40395957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 40395957 is about 6355.7813839055. The cubic root of 40395957 is about 343.1199477360.

The spelling of 40395957 in words is "forty million, three hundred ninety-five thousand, nine hundred fifty-seven".