30018972 has 24 divisors (see below), whose sum is σ = 70158592. Its totient is φ = 9990000.

The previous prime is 30018971. The next prime is 30018977. The reversal of 30018972 is 27981003.

It is a happy number.

It is a super-2 number, since 2×30018972² = 1802277359873568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30018971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7347 + ... + 10677.

Almost surely, 2^30018972 is an apocalyptic number.

It is an amenable number.

30018972 is an abundant number, since it is smaller than the sum of its proper divisors (40139620).

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

30018972 is a wasteful number, since it uses less digits than its factorization.

30018972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 30018972 is about 5478.9572000518. The cubic root of 30018972 is about 310.7887372540.

Adding to 30018972 its reverse (27981003), we get a palindrome (57999975).

The spelling of 30018972 in words is "thirty million, eighteen thousand, nine hundred seventy-two".