40257057 has 16 divisors (see below), whose sum is σ = 55296000. Its totient is φ = 26040144.

The previous prime is 40257031. The next prime is 40257059. The reversal of 40257057 is 75075204.

It is not a de Polignac number, because 40257057 - 2¹⁰ = 40256033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40257059) 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, 12544 + ... + 15422.

It is an arithmetic number, because the mean of its divisors is an integer number (3456000).

Almost surely, 2^40257057 is an apocalyptic number.

It is an amenable number.

40257057 is a deficient number, since it is larger than the sum of its proper divisors (15038943).

40257057 is a wasteful number, since it uses less digits than its factorization.

40257057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 40257057 is about 6344.8449153624. The cubic root of 40257057 is about 342.7262277216.

The spelling of 40257057 in words is "forty million, two hundred fifty-seven thousand, fifty-seven".