28907820529 has 27 divisors (see below), whose sum is σ = 34094871993. Its totient is φ = 24438425928.

The previous prime is 28907820523. The next prime is 28907820533. The reversal of 28907820529 is 92502870982.

It is a happy number.

The square root of 28907820529 is 170023.

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

It is not a de Polignac number, because 28907820529 - 2³ = 28907820521 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28907820521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 127347114 + ... + 127347340.

Almost surely, 2^28907820529 is an apocalyptic number.

28907820529 is the 170023-rd square number.

28907820529 is the 85012-nd centered octagonal number.

It is an amenable number.

28907820529 is a deficient number, since it is larger than the sum of its proper divisors (5187051464).

28907820529 is an frugal number, since it uses more digits than its factorization.

28907820529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 28907820529 in words is "twenty-eight billion, nine hundred seven million, eight hundred twenty thousand, five hundred twenty-nine".