28987792 has 10 divisors (see below), whose sum is σ = 56163878. Its totient is φ = 14493888.

The previous prime is 28987781. The next prime is 28987793. The reversal of 28987792 is 29778982.

It can be written as a sum of positive squares in only one way, i.e., 28772496 + 215296 = 5364^2 + 464^2 .

It is not an unprimeable number, because it can be changed into a prime (28987793) 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 as a sum of consecutive naturals, namely, 905853 + ... + 905884.

Almost surely, 2^28987792 is an apocalyptic number.

It is an amenable number.

28987792 is a deficient number, since it is larger than the sum of its proper divisors (27176086).

28987792 is a wasteful number, since it uses less digits than its factorization.

28987792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811745 (or 1811739 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 52.

The square root of 28987792 is about 5384.0312034757. The cubic root of 28987792 is about 307.1885652030.

The spelling of 28987792 in words is "twenty-eight million, nine hundred eighty-seven thousand, seven hundred ninety-two".