28999992 has 32 divisors (see below), whose sum is σ = 82857600. Its totient is φ = 8285664.

The previous prime is 28999991. The next prime is 29000039. The reversal of 28999992 is 29999982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86142 + ... + 86477.

It is an arithmetic number, because the mean of its divisors is an integer number (2589300).

Almost surely, 2^28999992 is an apocalyptic number.

It is an amenable number.

28999992 is an abundant number, since it is smaller than the sum of its proper divisors (53857608).

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

28999992 is a wasteful number, since it uses less digits than its factorization.

28999992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172635 (or 172631 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 57.

The square root of 28999992 is about 5385.1640643531. The cubic root of 28999992 is about 307.2316543174.

The spelling of 28999992 in words is "twenty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-two".