30189972 has 24 divisors (see below), whose sum is σ = 70652736. Its totient is φ = 10033408.

The previous prime is 30189959. The next prime is 30189983. The reversal of 30189972 is 27998103.

It is a super-2 number, since 2×30189972² = 1822868818721568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30189972.

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, 673 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (2943864).

Almost surely, 2^30189972 is an apocalyptic number.

It is an amenable number.

30189972 is an abundant number, since it is smaller than the sum of its proper divisors (40462764).

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

30189972 is a wasteful number, since it uses less digits than its factorization.

30189972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487 (or 7485 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 30189972 is about 5494.5401991431. The cubic root of 30189972 is about 311.3777456625.

The spelling of 30189972 in words is "thirty million, one hundred eighty-nine thousand, nine hundred seventy-two".