28886741521 has 9 divisors (see below), whose sum is σ = 31753597449. Its totient is φ = 26258974500.

The previous prime is 28886741473. The next prime is 28886741567. The reversal of 28886741521 is 12514768882.

The square root of 28886741521 is 169961.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28886741521 - 2¹⁷ = 28886610449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28886741591) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1861846 + ... + 1877296.

Almost surely, 2^28886741521 is an apocalyptic number.

28886741521 is the 169961-st square number.

28886741521 is the 84981-st centered octagonal number.

It is an amenable number.

28886741521 is a deficient number, since it is larger than the sum of its proper divisors (2866855928).

28886741521 is an frugal number, since it uses more digits than its factorization.

28886741521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30924 (or 15462 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 52.

It can be divided in two parts, 2888 and 6741521, that added together give a square (6744409 = 2597²).

The spelling of 28886741521 in words is "twenty-eight billion, eight hundred eighty-six million, seven hundred forty-one thousand, five hundred twenty-one".