30131620 has 24 divisors (see below), whose sum is σ = 63895104. Its totient is φ = 11934816.

The previous prime is 30131603. The next prime is 30131669. The reversal of 30131620 is 2613103.

It is a junction number, because it is equal to n+sod(n) for n = 30131594 and 30131603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5254 + ... + 9373.

It is an arithmetic number, because the mean of its divisors is an integer number (2662296).

Almost surely, 2^30131620 is an apocalyptic number.

It is an amenable number.

30131620 is an abundant number, since it is smaller than the sum of its proper divisors (33763484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30131620 is a wasteful number, since it uses less digits than its factorization.

30131620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14739 (or 14737 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 30131620 is about 5489.2276323723. The cubic root of 30131620 is about 311.1770031446.

Adding to 30131620 its reverse (2613103), we get a palindrome (32744723).

The spelling of 30131620 in words is "thirty million, one hundred thirty-one thousand, six hundred twenty".