28239792 has 40 divisors (see below), whose sum is σ = 83375616. Its totient is φ = 8068416.

The previous prime is 28239787. The next prime is 28239797. The reversal of 28239792 is 29793282.

It is an interprime number because it is at equal distance from previous prime (28239787) and next prime (28239797).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (28239797) 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, 41688 + ... + 42359.

Almost surely, 2^28239792 is an apocalyptic number.

It is an amenable number.

28239792 is an abundant number, since it is smaller than the sum of its proper divisors (55135824).

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

28239792 is a wasteful number, since it uses less digits than its factorization.

28239792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84065 (or 84059 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 28239792 is about 5314.1125317404. The cubic root of 28239792 is about 304.5232792726.

It can be divided in two parts, 28 and 239792, that multiplied together give a palindrome (6714176).

The spelling of 28239792 in words is "twenty-eight million, two hundred thirty-nine thousand, seven hundred ninety-two".