40392457 has 16 divisors (see below), whose sum is σ = 47013120. Its totient is φ = 33991488.

The previous prime is 40392371. The next prime is 40392467. The reversal of 40392457 is 75429304.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40392457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40392467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127263 + ... + 127579.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^40392457 is an apocalyptic number.

It is an amenable number.

40392457 is a deficient number, since it is larger than the sum of its proper divisors (6620663).

40392457 is a wasteful number, since it uses less digits than its factorization.

40392457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 40392457 is about 6355.5060380744. The cubic root of 40392457 is about 343.1100378787.

The spelling of 40392457 in words is "forty million, three hundred ninety-two thousand, four hundred fifty-seven".