28379808 has 60 divisors (see below), whose sum is σ = 83471850. Its totient is φ = 9459072.

The previous prime is 28379807. The next prime is 28379809. The reversal of 28379808 is 80897382.

It is an interprime number because it is at equal distance from previous prime (28379807) and next prime (28379809).

It can be written as a sum of positive squares in only one way, i.e., 28005264 + 374544 = 5292^2 + 612^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28379807) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2883 + ... + 8066.

Almost surely, 2^28379808 is an apocalyptic number.

It is an amenable number.

28379808 is an abundant number, since it is smaller than the sum of its proper divisors (55092042).

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

28379808 is a wasteful number, since it uses less digits than its factorization.

28379808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10971 (or 10954 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 28379808 is about 5327.2702202911. The cubic root of 28379808 is about 305.0257364290.

The spelling of 28379808 in words is "twenty-eight million, three hundred seventy-nine thousand, eight hundred eight".