28897777501584 has 40 divisors (see below), whose sum is σ = 74657288687232. Its totient is φ = 9631986460800.

The previous prime is 28897777501577. The next prime is 28897777501643. The reversal of 28897777501584 is 48510577779882.

It is an unprimeable number.

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, 18167544 + ... + 19694039.

Almost surely, 2^{28897777501584} is an apocalyptic number.

28897777501584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28897777501584 is an abundant number, since it is smaller than the sum of its proper divisors (45759511185648).

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

28897777501584 is a wasteful number, since it uses less digits than its factorization.

28897777501584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37877495 (or 37877489 counting only the distinct ones).

The product of its (nonzero) digits is 2212761600, while the sum is 78.

The spelling of 28897777501584 in words is "twenty-eight trillion, eight hundred ninety-seven billion, seven hundred seventy-seven million, five hundred one thousand, five hundred eighty-four".