28907023632 has 80 divisors (see below), whose sum is σ = 76628047872. Its totient is φ = 9385810560.

The previous prime is 28907023597. The next prime is 28907023657. The reversal of 28907023632 is 23632070982.

It is a super-2 number, since 2×28907023632² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 445653 + ... + 506379.

Almost surely, 2^28907023632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28907023632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38314023936).

28907023632 is an abundant number, since it is smaller than the sum of its proper divisors (47721024240).

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

28907023632 is a wasteful number, since it uses less digits than its factorization.

28907023632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60996 (or 60990 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 28907023632 in words is "twenty-eight billion, nine hundred seven million, twenty-three thousand, six hundred thirty-two".