30887428 has 36 divisors (see below), whose sum is σ = 63996940. Its totient is φ = 12957120.

The previous prime is 30887401. The next prime is 30887443. The reversal of 30887428 is 82478803.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 10745284 = 4488^2 + 3278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3838 + ... + 8746.

Almost surely, 2^30887428 is an apocalyptic number.

It is an amenable number.

30887428 is an abundant number, since it is smaller than the sum of its proper divisors (33109512).

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

30887428 is a wasteful number, since it uses less digits than its factorization.

30887428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948 (or 4935 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 30887428 is about 5557.6459045175. The cubic root of 30887428 is about 313.7573551077.

The spelling of 30887428 in words is "thirty million, eight hundred eighty-seven thousand, four hundred twenty-eight".