28821352 has 32 divisors (see below), whose sum is σ = 63201600. Its totient is φ = 12063744.

The previous prime is 28821329. The next prime is 28821367. The reversal of 28821352 is 25312882.

It is a super-2 number, since 2×28821352² = 1661340662215808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3577 + ... + 8392.

It is an arithmetic number, because the mean of its divisors is an integer number (1975050).

Almost surely, 2^28821352 is an apocalyptic number.

It is an amenable number.

28821352 is an abundant number, since it is smaller than the sum of its proper divisors (34380248).

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

28821352 is a wasteful number, since it uses less digits than its factorization.

28821352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12025 (or 12021 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 28821352 is about 5368.5521325586. The cubic root of 28821352 is about 306.5995053513.

The spelling of 28821352 in words is "twenty-eight million, eight hundred twenty-one thousand, three hundred fifty-two".