28290072492 has 108 divisors (see below), whose sum is σ = 80276003808. Its totient is φ = 8390289600.

The previous prime is 28290072479. The next prime is 28290072497. The reversal of 28290072492 is 29427009282.

28290072492 is a `hidden beast` number, since 2 + 8 + 2 + 90 + 0 + 72 + 492 = 666.

It is not an unprimeable number, because it can be changed into a prime (28290072497) 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 35 ways as a sum of consecutive naturals, for example, 135642 + ... + 273822.

Almost surely, 2^28290072492 is an apocalyptic number.

28290072492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28290072492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40138001904).

28290072492 is an abundant number, since it is smaller than the sum of its proper divisors (51985931316).

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

28290072492 is a wasteful number, since it uses less digits than its factorization.

28290072492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138260 (or 138244 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28290072492 in words is "twenty-eight billion, two hundred ninety million, seventy-two thousand, four hundred ninety-two".