28922297 has 8 divisors (see below), whose sum is σ = 29355456. Its totient is φ = 28492272.

The previous prime is 28922291. The next prime is 28922329. The reversal of 28922297 is 79222982.

It is a happy number.

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

It is not a de Polignac number, because 28922297 - 2⁶ = 28922233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28922291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22763 + ... + 23999.

It is an arithmetic number, because the mean of its divisors is an integer number (3669432).

Almost surely, 2^28922297 is an apocalyptic number.

It is an amenable number.

28922297 is a deficient number, since it is larger than the sum of its proper divisors (433159).

28922297 is a wasteful number, since it uses less digits than its factorization.

28922297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its digits is 72576, while the sum is 41.

The square root of 28922297 is about 5377.9454255319. The cubic root of 28922297 is about 306.9570368565.

The spelling of 28922297 in words is "twenty-eight million, nine hundred twenty-two thousand, two hundred ninety-seven".