28276990 has 16 divisors (see below), whose sum is σ = 58169952. Its totient is φ = 9694944.

The previous prime is 28276981. The next prime is 28277017. The reversal of 28276990 is 9967282.

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, 201909 + ... + 202048.

It is an arithmetic number, because the mean of its divisors is an integer number (3635622).

Almost surely, 2^28276990 is an apocalyptic number.

28276990 is an abundant number, since it is smaller than the sum of its proper divisors (29892962).

28276990 is a wasteful number, since it uses less digits than its factorization.

28276990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403971.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 28276990 is about 5317.6113058402. The cubic root of 28276990 is about 304.6569285917.

The spelling of 28276990 in words is "twenty-eight million, two hundred seventy-six thousand, nine hundred ninety".