28907229816 has 48 divisors (see below), whose sum is σ = 78727825800. Its totient is φ = 9581908032.

The previous prime is 28907229803. The next prime is 28907229829. The reversal of 28907229816 is 61892270982.

28907229816 is a `hidden beast` number, since 289 + 0 + 72 + 298 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (28907229803) and next prime (28907229829).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1108591 + ... + 1134366.

Almost surely, 2^28907229816 is an apocalyptic number.

It is an amenable number.

28907229816 is an abundant number, since it is smaller than the sum of its proper divisors (49820595984).

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

28907229816 is a wasteful number, since it uses less digits than its factorization.

28907229816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243148 (or 2243141 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 28907229816 in words is "twenty-eight billion, nine hundred seven million, two hundred twenty-nine thousand, eight hundred sixteen".