28897590 has 16 divisors (see below), whose sum is σ = 69354288. Its totient is φ = 7706016.

The previous prime is 28897571. The next prime is 28897607. The reversal of 28897590 is 9579882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481597 + ... + 481656.

It is an arithmetic number, because the mean of its divisors is an integer number (4334643).

Almost surely, 2^28897590 is an apocalyptic number.

28897590 is an abundant number, since it is smaller than the sum of its proper divisors (40456698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28897590 is a wasteful number, since it uses less digits than its factorization.

28897590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963263.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 28897590 is about 5375.6478679318. The cubic root of 28897590 is about 306.8696054873.

The spelling of 28897590 in words is "twenty-eight million, eight hundred ninety-seven thousand, five hundred ninety".