28897777501583 has 32 divisors (see below), whose sum is σ = 31262519249280. Its totient is φ = 26611835904000.

The previous prime is 28897777501577. The next prime is 28897777501643. The reversal of 28897777501583 is 38510577779882.

It is not a de Polignac number, because 28897777501583 - 2²² = 28897773307279 is a prime.

It is a super-2 number, since 2×28897777501583² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897777507583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229610813 + ... + 229736633.

It is an arithmetic number, because the mean of its divisors is an integer number (976953726540).

Almost surely, 2^{28897777501583} is an apocalyptic number.

28897777501583 is a deficient number, since it is larger than the sum of its proper divisors (2364741747697).

28897777501583 is a wasteful number, since it uses less digits than its factorization.

28897777501583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127059.

The product of its (nonzero) digits is 1659571200, while the sum is 77.

The spelling of 28897777501583 in words is "twenty-eight trillion, eight hundred ninety-seven billion, seven hundred seventy-seven million, five hundred one thousand, five hundred eighty-three".