40007057 has 4 divisors (see below), whose sum is σ = 40046820. Its totient is φ = 39967296.

The previous prime is 40007053. The next prime is 40007059. The reversal of 40007057 is 75070004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 19855936 = 4489^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 40007057 - 2² = 40007053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40007053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18332 + ... + 20397.

It is an arithmetic number, because the mean of its divisors is an integer number (10011705).

Almost surely, 2^40007057 is an apocalyptic number.

It is an amenable number.

40007057 is a deficient number, since it is larger than the sum of its proper divisors (39763).

40007057 is a wasteful number, since it uses less digits than its factorization.

40007057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39762.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 40007057 is about 6325.1132005680. The cubic root of 40007057 is about 342.0153003198.

The spelling of 40007057 in words is "forty million, seven thousand, fifty-seven".