28942392 has 64 divisors (see below), whose sum is σ = 75398400. Its totient is φ = 9250560.

The previous prime is 28942387. The next prime is 28942393. The reversal of 28942392 is 29324982.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28942392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28942393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65709 + ... + 66147.

It is an arithmetic number, because the mean of its divisors is an integer number (1178100).

Almost surely, 2^28942392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28942392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37699200).

28942392 is an abundant number, since it is smaller than the sum of its proper divisors (46456008).

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

28942392 is a wasteful number, since it uses less digits than its factorization.

28942392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 552 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 28942392 is about 5379.8133796629. The cubic root of 28942392 is about 307.0281108984.

The spelling of 28942392 in words is "twenty-eight million, nine hundred forty-two thousand, three hundred ninety-two".