40000257 has 16 divisors (see below), whose sum is σ = 64647360. Its totient is φ = 24242400.

The previous prime is 40000253. The next prime is 40000271. The reversal of 40000257 is 75200004.

It is a happy number.

It is not a de Polignac number, because 40000257 - 2² = 40000253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40000253) 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, 67044 + ... + 67637.

It is an arithmetic number, because the mean of its divisors is an integer number (4040460).

Almost surely, 2^40000257 is an apocalyptic number.

It is an amenable number.

40000257 is a deficient number, since it is larger than the sum of its proper divisors (24647103).

40000257 is a wasteful number, since it uses less digits than its factorization.

40000257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134701 (or 134695 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 40000257 is about 6324.5756379381. The cubic root of 40000257 is about 341.9959217735.

The spelling of 40000257 in words is "forty million, two hundred fifty-seven", and thus it is an aban number.