28090196 has 6 divisors (see below), whose sum is σ = 49157850. Its totient is φ = 14045096.

The previous prime is 28090177. The next prime is 28090201. The reversal of 28090196 is 69109082.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 196 = 5300^2 + 14^2 .

It is a super-2 number, since 2×28090196² = 1578118222636832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3511271 + ... + 3511278.

It is an arithmetic number, because the mean of its divisors is an integer number (8192975).

Almost surely, 2^28090196 is an apocalyptic number.

It is an amenable number.

28090196 is a deficient number, since it is larger than the sum of its proper divisors (21067654).

28090196 is a wasteful number, since it uses less digits than its factorization.

28090196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022553 (or 7022551 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 28090196 is about 5300.0184905338. The cubic root of 28090196 is about 303.9846050607.

The spelling of 28090196 in words is "twenty-eight million, ninety thousand, one hundred ninety-six".