28890922 has 8 divisors (see below), whose sum is σ = 45885636. Its totient is φ = 13595712.

The previous prime is 28890919. The next prime is 28890941. The reversal of 28890922 is 22909882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28100601 + 790321 = 5301^2 + 889^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424833 + ... + 424900.

Almost surely, 2^28890922 is an apocalyptic number.

28890922 is a deficient number, since it is larger than the sum of its proper divisors (16994714).

28890922 is a wasteful number, since it uses less digits than its factorization.

28890922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849752.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28890922 is about 5375.0276278360. The cubic root of 28890922 is about 306.8460007053.

The spelling of 28890922 in words is "twenty-eight million, eight hundred ninety thousand, nine hundred twenty-two".