28390847272 has 64 divisors (see below), whose sum is σ = 55983312000. Its totient is φ = 13472067840.

The previous prime is 28390847201. The next prime is 28390847279. The reversal of 28390847272 is 27274809382.

It is not an unprimeable number, because it can be changed into a prime (28390847279) 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, 16709479 + ... + 16711177.

It is an arithmetic number, because the mean of its divisors is an integer number (874739250).

Almost surely, 2^28390847272 is an apocalyptic number.

It is an amenable number.

28390847272 is a deficient number, since it is larger than the sum of its proper divisors (27592464728).

28390847272 is a wasteful number, since it uses less digits than its factorization.

28390847272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 28390847272 in words is "twenty-eight billion, three hundred ninety million, eight hundred forty-seven thousand, two hundred seventy-two".