40624431 has 4 divisors (see below), whose sum is σ = 54165912. Its totient is φ = 27082952.

The previous prime is 40624393. The next prime is 40624439. The reversal of 40624431 is 13442604.

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 40624431 - 2¹³ = 40616239 is a prime.

It is a super-2 number, since 2×40624431² = 3300688788147522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40624439) 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, 6770736 + ... + 6770741.

It is an arithmetic number, because the mean of its divisors is an integer number (13541478).

Almost surely, 2^40624431 is an apocalyptic number.

40624431 is a deficient number, since it is larger than the sum of its proper divisors (13541481).

40624431 is a wasteful number, since it uses less digits than its factorization.

40624431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13541480.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40624431 is about 6373.7297558023. The cubic root of 40624431 is about 343.7656118089.

The spelling of 40624431 in words is "forty million, six hundred twenty-four thousand, four hundred thirty-one".