28866403120 has 20 divisors (see below), whose sum is σ = 67114387440. Its totient is φ = 11546561216.

The previous prime is 28866403117. The next prime is 28866403147. The reversal of 28866403120 is 2130466882.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180414940 + ... + 180415099.

It is an arithmetic number, because the mean of its divisors is an integer number (3355719372).

Almost surely, 2^28866403120 is an apocalyptic number.

28866403120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28866403120 is an abundant number, since it is smaller than the sum of its proper divisors (38247984320).

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

28866403120 is a wasteful number, since it uses less digits than its factorization.

28866403120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360830052 (or 360830046 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 28866403120 in words is "twenty-eight billion, eight hundred sixty-six million, four hundred three thousand, one hundred twenty".