30972224 has 56 divisors (see below), whose sum is σ = 64666368. Its totient is φ = 14699520.

The previous prime is 30972211. The next prime is 30972233. The reversal of 30972224 is 42227903.

It is a happy number.

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, 132812 + ... + 133044.

Almost surely, 2^30972224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30972224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32333184).

30972224 is an abundant number, since it is smaller than the sum of its proper divisors (33694144).

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

30972224 is a wasteful number, since it uses less digits than its factorization.

30972224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 30972224 is about 5565.2694454087. The cubic root of 30972224 is about 314.0442146347.

The spelling of 30972224 in words is "thirty million, nine hundred seventy-two thousand, two hundred twenty-four".