28749620164 has 24 divisors (see below), whose sum is σ = 50670978176. Its totient is φ = 14272524000.

The previous prime is 28749620153. The next prime is 28749620167. The reversal of 28749620164 is 46102694782.

It is not an unprimeable number, because it can be changed into a prime (28749620167) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 314869 + ... + 395779.

Almost surely, 2^28749620164 is an apocalyptic number.

It is an amenable number.

28749620164 is a deficient number, since it is larger than the sum of its proper divisors (21921358012).

28749620164 is a wasteful number, since it uses less digits than its factorization.

28749620164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81547 (or 81545 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 28749620164 in words is "twenty-eight billion, seven hundred forty-nine million, six hundred twenty thousand, one hundred sixty-four".