40646457 has 24 divisors (see below), whose sum is σ = 61195680. Its totient is φ = 25974720.

The previous prime is 40646449. The next prime is 40646467. The reversal of 40646457 is 75464604.

40646457 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 645 + 7 = 666.

It is not a de Polignac number, because 40646457 - 2³ = 40646449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40646447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20838 + ... + 22704.

It is an arithmetic number, because the mean of its divisors is an integer number (2549820).

Almost surely, 2^40646457 is an apocalyptic number.

It is an amenable number.

40646457 is a deficient number, since it is larger than the sum of its proper divisors (20549223).

40646457 is a wasteful number, since it uses less digits than its factorization.

40646457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 40646457 is about 6375.4573953560. The cubic root of 40646457 is about 343.8277288909.

The spelling of 40646457 in words is "forty million, six hundred forty-six thousand, four hundred fifty-seven".