31420630 has 16 divisors (see below), whose sum is σ = 58507920. Its totient is φ = 12134752.

The previous prime is 31420621. The next prime is 31420651. The reversal of 31420630 is 3602413.

It is a junction number, because it is equal to n+sod(n) for n = 31420598 and 31420607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53884 + ... + 54463.

It is an arithmetic number, because the mean of its divisors is an integer number (3656745).

Almost surely, 2^31420630 is an apocalyptic number.

31420630 is a deficient number, since it is larger than the sum of its proper divisors (27087290).

31420630 is a wasteful number, since it uses less digits than its factorization.

31420630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108383.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 31420630 is about 5605.4107788814. The cubic root of 31420630 is about 315.5525031022.

The spelling of 31420630 in words is "thirty-one million, four hundred twenty thousand, six hundred thirty".