40623631 has 4 divisors (see below), whose sum is σ = 40656112. Its totient is φ = 40591152.

The previous prime is 40623607. The next prime is 40623643. The reversal of 40623631 is 13632604.

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

It is a cyclic number.

It is not a de Polignac number, because 40623631 - 2⁹ = 40623119 is a prime.

It is a super-2 number, since 2×40623631² = 3300558791248322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40623596 and 40623605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40623601) 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, 14286 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (10164028).

Almost surely, 2^40623631 is an apocalyptic number.

40623631 is a deficient number, since it is larger than the sum of its proper divisors (32481).

40623631 is a wasteful number, since it uses less digits than its factorization.

40623631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32480.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 40623631 is about 6373.6669978906. Note that the first 3 decimals coincide. The cubic root of 40623631 is about 343.7633552497.

The spelling of 40623631 in words is "forty million, six hundred twenty-three thousand, six hundred thirty-one".