28038312 has 48 divisors (see below), whose sum is σ = 78755040. Its totient is φ = 9345456.

The previous prime is 28038299. The next prime is 28038337. The reversal of 28038312 is 21383082.

28038312 is a `hidden beast` number, since 280 + 383 + 1 + 2 = 666.

It is a super-2 number, since 2×28038312² = 1572293879618688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5268 + ... + 9155.

It is an arithmetic number, because the mean of its divisors is an integer number (1640730).

Almost surely, 2^28038312 is an apocalyptic number.

It is an amenable number.

28038312 is an abundant number, since it is smaller than the sum of its proper divisors (50716728).

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

28038312 is a wasteful number, since it uses less digits than its factorization.

28038312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14444 (or 14428 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28038312 is about 5295.1215283504. The cubic root of 28038312 is about 303.7973314446.

The spelling of 28038312 in words is "twenty-eight million, thirty-eight thousand, three hundred twelve".