30172992 has 56 divisors (see below), whose sum is σ = 82600800. Its totient is φ = 9709056.

The previous prime is 30172973. The next prime is 30172999. The reversal of 30172992 is 29927103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30172999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2859 + ... + 8277.

Almost surely, 2^30172992 is an apocalyptic number.

30172992 is a gapful number since it is divisible by the number (32) 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 30172992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41300400).

30172992 is an abundant number, since it is smaller than the sum of its proper divisors (52427808).

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

30172992 is a wasteful number, since it uses less digits than its factorization.

30172992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5463 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 30172992 is about 5492.9948115759. The cubic root of 30172992 is about 311.3193577793.

The spelling of 30172992 in words is "thirty million, one hundred seventy-two thousand, nine hundred ninety-two".