28740472 has 48 divisors (see below), whose sum is σ = 59238720. Its totient is φ = 13056000.

The previous prime is 28740451. The next prime is 28740497. The reversal of 28740472 is 27404782.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 71472 + ... + 71872.

It is an arithmetic number, because the mean of its divisors is an integer number (1234140).

Almost surely, 2^28740472 is an apocalyptic number.

It is an amenable number.

28740472 is an abundant number, since it is smaller than the sum of its proper divisors (30498248).

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

28740472 is a wasteful number, since it uses less digits than its factorization.

28740472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 28740472 is about 5361.0140831749. The cubic root of 28740472 is about 306.3124380815.

The spelling of 28740472 in words is "twenty-eight million, seven hundred forty thousand, four hundred seventy-two".