28992513 has 16 divisors (see below), whose sum is σ = 42296256. Its totient is φ = 17519040.

The previous prime is 28992511. The next prime is 28992521. The reversal of 28992513 is 31529982.

It is not a de Polignac number, because 28992513 - 2¹ = 28992511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28992511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11995 + ... + 14207.

It is an arithmetic number, because the mean of its divisors is an integer number (2643516).

Almost surely, 2^28992513 is an apocalyptic number.

It is an amenable number.

28992513 is a deficient number, since it is larger than the sum of its proper divisors (13303743).

28992513 is a wasteful number, since it uses less digits than its factorization.

28992513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624.

The product of its digits is 38880, while the sum is 39.

The square root of 28992513 is about 5384.4696117631. The cubic root of 28992513 is about 307.2052407112.

The spelling of 28992513 in words is "twenty-eight million, nine hundred ninety-two thousand, five hundred thirteen".