28992297 has 8 divisors (see below), whose sum is σ = 38998944. Its totient is φ = 19156928.

The previous prime is 28992283. The next prime is 28992311. The reversal of 28992297 is 79229982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28992283) and next prime (28992311).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28992297 - 2⁴ = 28992281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28992217) 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 7 ways as a sum of consecutive naturals, for example, 42423 + ... + 43100.

It is an arithmetic number, because the mean of its divisors is an integer number (4874868).

Almost surely, 2^28992297 is an apocalyptic number.

It is an amenable number.

28992297 is a deficient number, since it is larger than the sum of its proper divisors (10006647).

28992297 is a wasteful number, since it uses less digits than its factorization.

28992297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85639.

The product of its digits is 326592, while the sum is 48.

The square root of 28992297 is about 5384.4495540399. The cubic root of 28992297 is about 307.2044777959.

The spelling of 28992297 in words is "twenty-eight million, nine hundred ninety-two thousand, two hundred ninety-seven".