28768732940 has 24 divisors (see below), whose sum is σ = 61012505232. Its totient is φ = 11393556800.

The previous prime is 28768732939. The next prime is 28768732991. The reversal of 28768732940 is 4923786782.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7118954 + ... + 7122993.

It is an arithmetic number, because the mean of its divisors is an integer number (2542187718).

Almost surely, 2^28768732940 is an apocalyptic number.

28768732940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28768732940 is an abundant number, since it is smaller than the sum of its proper divisors (32243772292).

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

28768732940 is a wasteful number, since it uses less digits than its factorization.

28768732940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14242057 (or 14242055 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 28768732940 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, nine hundred forty".