28716749640 has 128 divisors (see below), whose sum is σ = 96934464000. Its totient is φ = 7560843264.

The previous prime is 28716749629. The next prime is 28716749669. The reversal of 28716749640 is 4694761782.

28716749640 is a `hidden beast` number, since 28 + 71 + 67 + 496 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82969 + ... + 253608.

It is an arithmetic number, because the mean of its divisors is an integer number (757300500).

Almost surely, 2^28716749640 is an apocalyptic number.

28716749640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28716749640 is an abundant number, since it is smaller than the sum of its proper divisors (68217714360).

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

28716749640 is a wasteful number, since it uses less digits than its factorization.

28716749640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336676 (or 336666 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 28716749640 in words is "twenty-eight billion, seven hundred sixteen million, seven hundred forty-nine thousand, six hundred forty".