28295372280 has 128 divisors (see below), whose sum is σ = 102118694400. Its totient is φ = 6127114752.

The previous prime is 28295372243. The next prime is 28295372333. The reversal of 28295372280 is 8227359282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870487 + ... + 902406.

It is an arithmetic number, because the mean of its divisors is an integer number (797802300).

Almost surely, 2^28295372280 is an apocalyptic number.

28295372280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28295372280 is an abundant number, since it is smaller than the sum of its proper divisors (73823322120).

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

28295372280 is a wasteful number, since it uses less digits than its factorization.

28295372280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772933 (or 1772929 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 28295372280 in words is "twenty-eight billion, two hundred ninety-five million, three hundred seventy-two thousand, two hundred eighty".