28999235904 has 28 divisors (see below), whose sum is σ = 76727145504. Its totient is φ = 9666411904.

The previous prime is 28999235899. The next prime is 28999235927. The reversal of 28999235904 is 40953299982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75518652 + ... + 75519035.

Almost surely, 2^28999235904 is an apocalyptic number.

28999235904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28999235904 is an abundant number, since it is smaller than the sum of its proper divisors (47727909600).

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

28999235904 is a wasteful number, since it uses less digits than its factorization.

28999235904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151037702 (or 151037692 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 28999235904 in words is "twenty-eight billion, nine hundred ninety-nine million, two hundred thirty-five thousand, nine hundred four".