28162992 has 120 divisors (see below), whose sum is σ = 86352112. Its totient is φ = 7856640.

The previous prime is 28162991. The next prime is 28163021. The reversal of 28162992 is 29926182.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 28162992.

It is not an unprimeable number, because it can be changed into a prime (28162991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75318 + ... + 75690.

Almost surely, 2^28162992 is an apocalyptic number.

28162992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28162992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43176056).

28162992 is an abundant number, since it is smaller than the sum of its proper divisors (58189120).

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

28162992 is a wasteful number, since it uses less digits than its factorization.

28162992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 402 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 28162992 is about 5306.8815701879. The cubic root of 28162992 is about 304.2469715113.

The spelling of 28162992 in words is "twenty-eight million, one hundred sixty-two thousand, nine hundred ninety-two".