28876398 has 8 divisors (see below), whose sum is σ = 57752808. Its totient is φ = 9625464.

The previous prime is 28876381. The next prime is 28876417. The reversal of 28876398 is 89367882.

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

28876398 is an admirable number.

It is a super-2 number, since 2×28876398² = 1667692722908808, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28876398.

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, 2406361 + ... + 2406372.

It is an arithmetic number, because the mean of its divisors is an integer number (7219101).

Almost surely, 2^28876398 is an apocalyptic number.

28876398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28876398 is a wasteful number, since it uses less digits than its factorization.

28876398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812738.

The product of its digits is 1161216, while the sum is 51.

The square root of 28876398 is about 5373.6763951693. The cubic root of 28876398 is about 306.7945730361.

The spelling of 28876398 in words is "twenty-eight million, eight hundred seventy-six thousand, three hundred ninety-eight".