28087392 has 24 divisors (see below), whose sum is σ = 73729656. Its totient is φ = 9362432.

The previous prime is 28087373. The next prime is 28087429. The reversal of 28087392 is 29378082.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28087392.

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, 146193 + ... + 146384.

It is an arithmetic number, because the mean of its divisors is an integer number (3072069).

Almost surely, 2^28087392 is an apocalyptic number.

It is an amenable number.

28087392 is an abundant number, since it is smaller than the sum of its proper divisors (45642264).

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

28087392 is a wasteful number, since it uses less digits than its factorization.

28087392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292590 (or 292582 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28087392 is about 5299.7539565531. The cubic root of 28087392 is about 303.9744900108.

The spelling of 28087392 in words is "twenty-eight million, eighty-seven thousand, three hundred ninety-two".