28215460800 has 126 divisors (see below), whose sum is σ = 100284460848. Its totient is φ = 7524119040.

The previous prime is 28215460739. The next prime is 28215460817. The reversal of 28215460800 is 806451282.

28215460800 is a `hidden beast` number, since 28 + 21 + 5 + 4 + 608 + 0 + 0 = 666.

It is a super-2 number, since 2×28215460800² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 965304 + ... + 994103.

Almost surely, 2^28215460800 is an apocalyptic number.

28215460800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28215460800 is an abundant number, since it is smaller than the sum of its proper divisors (72069000048).

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

28215460800 is a wasteful number, since it uses less digits than its factorization.

28215460800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959435 (or 1959417 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 28215460800 in words is "twenty-eight billion, two hundred fifteen million, four hundred sixty thousand, eight hundred".