408072631 has 4 divisors (see below), whose sum is σ = 418025664. Its totient is φ = 398119600.

The previous prime is 408072629. The next prime is 408072649. The reversal of 408072631 is 136270804.

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 408072631 - 2¹ = 408072629 is a prime.

It is a super-2 number, since 2×408072631² = 333046544342524322, 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 = 408072593 and 408072602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408070631) 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, 4976455 + ... + 4976536.

It is an arithmetic number, because the mean of its divisors is an integer number (104506416).

Almost surely, 2^408072631 is an apocalyptic number.

408072631 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

408072631 is a deficient number, since it is larger than the sum of its proper divisors (9953033).

408072631 is an equidigital number, since it uses as much as digits as its factorization.

408072631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9953032.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 408072631 is about 20200.8076818725. The cubic root of 408072631 is about 741.7299621835.

The spelling of 408072631 in words is "four hundred eight million, seventy-two thousand, six hundred thirty-one".