30886280 has 64 divisors (see below), whose sum is σ = 75057840. Its totient is φ = 11395072.

The previous prime is 30886279. The next prime is 30886283. The reversal of 30886280 is 8268803.

It can be written as a sum of positive squares in 8 ways, for example, as 27478564 + 3407716 = 5242^2 + 1846^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30886280.

It is not an unprimeable number, because it can be changed into a prime (30886283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35612 + ... + 36468.

Almost surely, 2^30886280 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 30886280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37528920).

30886280 is an abundant number, since it is smaller than the sum of its proper divisors (44171560).

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

30886280 is a wasteful number, since it uses less digits than its factorization.

30886280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 30886280 is about 5557.5426224187. The cubic root of 30886280 is about 313.7534678960.

The spelling of 30886280 in words is "thirty million, eight hundred eighty-six thousand, two hundred eighty".