28190376 has 64 divisors (see below), whose sum is σ = 82440000. Its totient is φ = 8900928.

The previous prime is 28190363. The next prime is 28190381. The reversal of 28190376 is 67309182.

28190376 is a `hidden beast` number, since 281 + 9 + 0 + 376 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28190376.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670 + ... + 7538.

It is an arithmetic number, because the mean of its divisors is an integer number (1288125).

Almost surely, 2^28190376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28190376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41220000).

28190376 is an abundant number, since it is smaller than the sum of its proper divisors (54249624).

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

28190376 is a wasteful number, since it uses less digits than its factorization.

28190376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6903 (or 6893 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28190376 is about 5309.4609895921. The cubic root of 28190376 is about 304.3455500546.

The spelling of 28190376 in words is "twenty-eight million, one hundred ninety thousand, three hundred seventy-six".