28191196 has 24 divisors (see below), whose sum is σ = 54020736. Its totient is φ = 12766320.

The previous prime is 28191167. The next prime is 28191197. The reversal of 28191196 is 69119182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28191197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12465 + ... + 14551.

It is an arithmetic number, because the mean of its divisors is an integer number (2250864).

Almost surely, 2^28191196 is an apocalyptic number.

It is an amenable number.

28191196 is a deficient number, since it is larger than the sum of its proper divisors (25829540).

28191196 is a wasteful number, since it uses less digits than its factorization.

28191196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2407 counting only the distinct ones).

The product of its digits is 7776, while the sum is 37.

The square root of 28191196 is about 5309.5382096751. The cubic root of 28191196 is about 304.3485009544.

It can be divided in two parts, 2819119 and 6, that added together give a triangular number (2819125 = T₂₃₇₄).

The spelling of 28191196 in words is "twenty-eight million, one hundred ninety-one thousand, one hundred ninety-six".