28029320 has 32 divisors (see below), whose sum is σ = 68800320. Its totient is φ = 10192320.

The previous prime is 28029289. The next prime is 28029347. The reversal of 28029320 is 2392082.

It is a self number, because there is not a number n which added to its sum of digits gives 28029320.

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, 31412 + ... + 32291.

It is an arithmetic number, because the mean of its divisors is an integer number (2150010).

Almost surely, 2^28029320 is an apocalyptic number.

28029320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28029320 is an abundant number, since it is smaller than the sum of its proper divisors (40771000).

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

28029320 is a wasteful number, since it uses less digits than its factorization.

28029320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63725 (or 63721 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 28029320 is about 5294.2723768238. The cubic root of 28029320 is about 303.7648516281.

The spelling of 28029320 in words is "twenty-eight million, twenty-nine thousand, three hundred twenty".