28272942 has 16 divisors (see below), whose sum is σ = 62828880. Its totient is φ = 9424296.

The previous prime is 28272929. The next prime is 28272947. The reversal of 28272942 is 24927282.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28272897 and 28272906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272947) 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, 261733 + ... + 261840.

It is an arithmetic number, because the mean of its divisors is an integer number (3926805).

Almost surely, 2^28272942 is an apocalyptic number.

28272942 is an abundant number, since it is smaller than the sum of its proper divisors (34555938).

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

28272942 is a wasteful number, since it uses less digits than its factorization.

28272942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523584 (or 523578 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28272942 is about 5317.2306701891. The cubic root of 28272942 is about 304.6423901501.

The spelling of 28272942 in words is "twenty-eight million, two hundred seventy-two thousand, nine hundred forty-two".