28319392 has 12 divisors (see below), whose sum is σ = 55753866. Its totient is φ = 14159680.

The previous prime is 28319381. The next prime is 28319419. The reversal of 28319392 is 29391382.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 59536 = 5316^2 + 244^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442459 + ... + 442522.

Almost surely, 2^28319392 is an apocalyptic number.

It is an amenable number.

28319392 is a deficient number, since it is larger than the sum of its proper divisors (27434474).

28319392 is an equidigital number, since it uses as much as digits as its factorization.

28319392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884991 (or 884983 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 28319392 is about 5321.5967528553. The cubic root of 28319392 is about 304.8091325743.

The spelling of 28319392 in words is "twenty-eight million, three hundred nineteen thousand, three hundred ninety-two".