28942899 has 16 divisors (see below), whose sum is σ = 40098720. Its totient is φ = 18547200.

The previous prime is 28942883. The next prime is 28942931. The reversal of 28942899 is 99824982.

It is not a de Polignac number, because 28942899 - 2⁴ = 28942883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28942829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23499 + ... + 24699.

It is an arithmetic number, because the mean of its divisors is an integer number (2506170).

Almost surely, 2^28942899 is an apocalyptic number.

28942899 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28942899 is a deficient number, since it is larger than the sum of its proper divisors (11155821).

28942899 is a wasteful number, since it uses less digits than its factorization.

28942899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510.

The product of its digits is 746496, while the sum is 51.

The square root of 28942899 is about 5379.8605000502. The cubic root of 28942899 is about 307.0299036820.

The spelling of 28942899 in words is "twenty-eight million, nine hundred forty-two thousand, eight hundred ninety-nine".