28704158442 has 24 divisors (see below), whose sum is σ = 63873218916. Its totient is φ = 9309456576.

The previous prime is 28704158389. The next prime is 28704158473. The reversal of 28704158442 is 24485140782.

28704158442 is a `hidden beast` number, since 28 + 7 + 0 + 4 + 1 + 584 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28560662001 + 143496441 = 168999^2 + 11979^2 .

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, 21549003 + ... + 21550334.

Almost surely, 2^28704158442 is an apocalyptic number.

28704158442 is an abundant number, since it is smaller than the sum of its proper divisors (35169060474).

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

28704158442 is a wasteful number, since it uses less digits than its factorization.

28704158442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43099382 (or 43099379 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The spelling of 28704158442 in words is "twenty-eight billion, seven hundred four million, one hundred fifty-eight thousand, four hundred forty-two".