40456257 has 8 divisors (see below), whose sum is σ = 54476160. Its totient is φ = 26703600.

The previous prime is 40456219. The next prime is 40456261. The reversal of 40456257 is 75265404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40456257 - 2⁶ = 40456193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40456267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66457 + ... + 67062.

It is an arithmetic number, because the mean of its divisors is an integer number (6809520).

Almost surely, 2^40456257 is an apocalyptic number.

It is an amenable number.

40456257 is a deficient number, since it is larger than the sum of its proper divisors (14019903).

40456257 is a wasteful number, since it uses less digits than its factorization.

40456257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133623.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 40456257 is about 6360.5233275258. The cubic root of 40456257 is about 343.2905906091.

The spelling of 40456257 in words is "forty million, four hundred fifty-six thousand, two hundred fifty-seven".