30486972 has 12 divisors (see below), whose sum is σ = 71136296. Its totient is φ = 10162320.

The previous prime is 30486971. The next prime is 30486977. The reversal of 30486972 is 27968403.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 30486972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30486971) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1270279 + ... + 1270302.

Almost surely, 2^30486972 is an apocalyptic number.

It is an amenable number.

30486972 is an abundant number, since it is smaller than the sum of its proper divisors (40649324).

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

30486972 is a wasteful number, since it uses less digits than its factorization.

30486972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540588 (or 2540586 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 30486972 is about 5521.5008829122. The cubic root of 30486972 is about 312.3954961499.

Subtracting from 30486972 its reverse (27968403), we obtain a square (2518569 = 1587²).

The spelling of 30486972 in words is "thirty million, four hundred eighty-six thousand, nine hundred seventy-two".