30977628 has 48 divisors (see below), whose sum is σ = 79201920. Its totient is φ = 9345600.

The previous prime is 30977603. The next prime is 30977633. The reversal of 30977628 is 82677903.

It is a super-2 number, since 2×30977628² = 1919226873012768, 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 30977628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43338 + ... + 44046.

It is an arithmetic number, because the mean of its divisors is an integer number (1650040).

Almost surely, 2^30977628 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 30977628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39600960).

30977628 is an abundant number, since it is smaller than the sum of its proper divisors (48224292).

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

30977628 is a wasteful number, since it uses less digits than its factorization.

30977628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 30977628 is about 5565.7549353165. The cubic root of 30977628 is about 314.0624782703.

The spelling of 30977628 in words is "thirty million, nine hundred seventy-seven thousand, six hundred twenty-eight".