28407336720 has 160 divisors (see below), whose sum is σ = 100692221952. Its totient is φ = 6489939456.

The previous prime is 28407336667. The next prime is 28407336733. The reversal of 28407336720 is 2763370482.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6420429 + ... + 6424851.

Almost surely, 2^28407336720 is an apocalyptic number.

28407336720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28407336720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50346110976).

28407336720 is an abundant number, since it is smaller than the sum of its proper divisors (72284885232).

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

28407336720 is a wasteful number, since it uses less digits than its factorization.

28407336720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8269 (or 8263 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The spelling of 28407336720 in words is "twenty-eight billion, four hundred seven million, three hundred thirty-six thousand, seven hundred twenty".