30992040 has 192 divisors, whose sum is σ = 111196800. Its totient is φ = 7451136.

The previous prime is 30992011. The next prime is 30992053. The reversal of 30992040 is 4029903.

It is a junction number, because it is equal to n+sod(n) for n = 30991995 and 30992013.

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 47 ways as a sum of consecutive naturals, for example, 157222 + ... + 157418.

It is an arithmetic number, because the mean of its divisors is an integer number (579150).

Almost surely, 2^30992040 is an apocalyptic number.

30992040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30992040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55598400).

30992040 is an abundant number, since it is smaller than the sum of its proper divisors (80204760).

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

30992040 is a wasteful number, since it uses less digits than its factorization.

30992040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 30992040 is about 5567.0494878346. The cubic root of 30992040 is about 314.1111754213. Note that the first 4 decimals are identical.

The spelling of 30992040 in words is "thirty million, nine hundred ninety-two thousand, forty".