28931403600900 has 144 divisors (see below), whose sum is σ = 96009398894080. Its totient is φ = 7466168649600.

The previous prime is 28931403600893. The next prime is 28931403600959. The reversal of 28931403600900 is 900630413982.

It is a happy number.

28931403600900 is a `hidden beast` number, since 2 + 8 + 9 + 31 + 4 + 0 + 3 + 600 + 9 + 0 + 0 = 666.

It is a super-2 number, since 2×28931403600900² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172744279 + ... + 172911678.

Almost surely, 2^{28931403600900} is an apocalyptic number.

28931403600900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28931403600900 is an abundant number, since it is smaller than the sum of its proper divisors (67077995293180).

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

28931403600900 is a wasteful number, since it uses less digits than its factorization.

28931403600900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345656011 (or 345655998 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 28931403600900 in words is "twenty-eight trillion, nine hundred thirty-one billion, four hundred three million, six hundred thousand, nine hundred".