28472380 has 24 divisors (see below), whose sum is σ = 60030432. Its totient is φ = 11343552.

The previous prime is 28472377. The next prime is 28472401. The reversal of 28472380 is 8327482.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2554 + ... + 7966.

It is an arithmetic number, because the mean of its divisors is an integer number (2501268).

Almost surely, 2^28472380 is an apocalyptic number.

28472380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28472380 is an abundant number, since it is smaller than the sum of its proper divisors (31558052).

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

28472380 is a wasteful number, since it uses less digits than its factorization.

28472380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685 (or 5683 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28472380 is about 5335.9516489564. The cubic root of 28472380 is about 305.3570306142.

The spelling of 28472380 in words is "twenty-eight million, four hundred seventy-two thousand, three hundred eighty".