28112990 has 8 divisors (see below), whose sum is σ = 50603400. Its totient is φ = 11245192.

The previous prime is 28112879. The next prime is 28113011. The reversal of 28112990 is 9921182.

It is a happy number.

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

It is a congruent number.

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, 1405640 + ... + 1405659.

It is an arithmetic number, because the mean of its divisors is an integer number (6325425).

Almost surely, 2^28112990 is an apocalyptic number.

28112990 is a deficient number, since it is larger than the sum of its proper divisors (22490410).

28112990 is a wasteful number, since it uses less digits than its factorization.

28112990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811306.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 28112990 is about 5302.1684243336. The cubic root of 28112990 is about 304.0668063588.

The spelling of 28112990 in words is "twenty-eight million, one hundred twelve thousand, nine hundred ninety".