28358636940 has 72 divisors (see below), whose sum is σ = 88796093568. Its totient is φ = 7318356480.

The previous prime is 28358636861. The next prime is 28358636959. The reversal of 28358636940 is 4963685382.

28358636940 is a `hidden beast` number, since 28 + 3 + 586 + 36 + 9 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2535517 + ... + 2546676.

Almost surely, 2^28358636940 is an apocalyptic number.

28358636940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28358636940 is an abundant number, since it is smaller than the sum of its proper divisors (60437456628).

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

28358636940 is a wasteful number, since it uses less digits than its factorization.

28358636940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082239 (or 5082234 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 28358636940 in words is "twenty-eight billion, three hundred fifty-eight million, six hundred thirty-six thousand, nine hundred forty".