28384392 has 32 divisors (see below), whose sum is σ = 74047680. Its totient is φ = 9049920.

The previous prime is 28384387. The next prime is 28384393. The reversal of 28384392 is 29348382.

It is a super-3 number, since 3×28384392³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28384392.

It is not an unprimeable number, because it can be changed into a prime (28384393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25159 + ... + 26262.

It is an arithmetic number, because the mean of its divisors is an integer number (2313990).

Almost surely, 2^28384392 is an apocalyptic number.

It is an amenable number.

28384392 is an abundant number, since it is smaller than the sum of its proper divisors (45663288).

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

28384392 is a wasteful number, since it uses less digits than its factorization.

28384392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51453 (or 51449 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 28384392 is about 5327.7004420294. The cubic root of 28384392 is about 305.0421584652.

The spelling of 28384392 in words is "twenty-eight million, three hundred eighty-four thousand, three hundred ninety-two".