28470672 has 30 divisors (see below), whose sum is σ = 79678742. Its totient is φ = 9490176.

The previous prime is 28470653. The next prime is 28470697. The reversal of 28470672 is 27607482.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 6230016 = 4716^2 + 2496^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98713 + ... + 99000.

Almost surely, 2^28470672 is an apocalyptic number.

It is an amenable number.

28470672 is an abundant number, since it is smaller than the sum of its proper divisors (51208070).

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

28470672 is a wasteful number, since it uses less digits than its factorization.

28470672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197727 (or 197718 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 28470672 is about 5335.7916001283. The cubic root of 28470672 is about 305.3509245769.

The spelling of 28470672 in words is "twenty-eight million, four hundred seventy thousand, six hundred seventy-two".