30992730 has 32 divisors (see below), whose sum is σ = 77618304. Its totient is φ = 7905216.

The previous prime is 30992719. The next prime is 30992749. The reversal of 30992730 is 3729903.

It is a junction number, because it is equal to n+sod(n) for n = 30992691 and 30992700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21769 + ... + 23148.

It is an arithmetic number, because the mean of its divisors is an integer number (2425572).

Almost surely, 2^30992730 is an apocalyptic number.

30992730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30992730 is an abundant number, since it is smaller than the sum of its proper divisors (46625574).

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

30992730 is a wasteful number, since it uses less digits than its factorization.

30992730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44950.

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 30992730 is about 5567.1114592758. Note that the first 3 decimals coincide. The cubic root of 30992730 is about 314.1135065049.

It can be divided in two parts, 309 and 92730, that added together give a palindrome (93039).

The spelling of 30992730 in words is "thirty million, nine hundred ninety-two thousand, seven hundred thirty".