28401479700 has 72 divisors (see below), whose sum is σ = 89645408160. Its totient is φ = 6885206400.

The previous prime is 28401479651. The next prime is 28401479713. The reversal of 28401479700 is 797410482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4299955 + ... + 4306554.

Almost surely, 2^28401479700 is an apocalyptic number.

28401479700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28401479700 is an abundant number, since it is smaller than the sum of its proper divisors (61243928460).

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

28401479700 is a wasteful number, since it uses less digits than its factorization.

28401479700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606537 (or 8606530 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 28401479700 in words is "twenty-eight billion, four hundred one million, four hundred seventy-nine thousand, seven hundred".