40658631 has 8 divisors (see below), whose sum is σ = 58381680. Its totient is φ = 25020672.

The previous prime is 40658623. The next prime is 40658659. The reversal of 40658631 is 13685604.

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

It is not a de Polignac number, because 40658631 - 2³ = 40658623 is a prime.

It is a super-2 number, since 2×40658631² = 3306248549588322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40658592 and 40658601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40658621) 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, 521226 + ... + 521303.

It is an arithmetic number, because the mean of its divisors is an integer number (7297710).

Almost surely, 2^40658631 is an apocalyptic number.

40658631 is a deficient number, since it is larger than the sum of its proper divisors (17723049).

40658631 is a wasteful number, since it uses less digits than its factorization.

40658631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042545.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40658631 is about 6376.4120789046. The cubic root of 40658631 is about 343.8620520215.

The spelling of 40658631 in words is "forty million, six hundred fifty-eight thousand, six hundred thirty-one".