40630657 has 4 divisors (see below), whose sum is σ = 41575600. Its totient is φ = 39685716.

The previous prime is 40630651. The next prime is 40630669. The reversal of 40630657 is 75603604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40630657 - 2³ = 40630649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40630651) 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, 472407 + ... + 472492.

It is an arithmetic number, because the mean of its divisors is an integer number (10393900).

Almost surely, 2^40630657 is an apocalyptic number.

It is an amenable number.

40630657 is a deficient number, since it is larger than the sum of its proper divisors (944943).

40630657 is an equidigital number, since it uses as much as digits as its factorization.

40630657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944942.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 40630657 is about 6374.2181481339. The cubic root of 40630657 is about 343.7831724681.

The spelling of 40630657 in words is "forty million, six hundred thirty thousand, six hundred fifty-seven".