28538697480 has 64 divisors (see below), whose sum is σ = 85819608000. Its totient is φ = 7592229120.

The previous prime is 28538697469. The next prime is 28538697497. The reversal of 28538697480 is 8479683582.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231930 + ... + 332969.

It is an arithmetic number, because the mean of its divisors is an integer number (1340931375).

Almost surely, 2^28538697480 is an apocalyptic number.

28538697480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28538697480 is an abundant number, since it is smaller than the sum of its proper divisors (57280910520).

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

28538697480 is a wasteful number, since it uses less digits than its factorization.

28538697480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565334 (or 565330 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 28538697480 in words is "twenty-eight billion, five hundred thirty-eight million, six hundred ninety-seven thousand, four hundred eighty".