28392156 has 144 divisors (see below), whose sum is σ = 84797440. Its totient is φ = 7931520.

The previous prime is 28392151. The next prime is 28392163. The reversal of 28392156 is 65129382.

It is a super-2 number, since 2×28392156² = 1612229044656672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28392156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28392151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275601 + ... + 275703.

Almost surely, 2^28392156 is an apocalyptic number.

28392156 is a gapful number since it is divisible by the number (26) 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 28392156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42398720).

28392156 is an abundant number, since it is smaller than the sum of its proper divisors (56405284).

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

28392156 is a wasteful number, since it uses less digits than its factorization.

28392156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 171 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28392156 is about 5328.4290367800. The cubic root of 28392156 is about 305.0699687187.

The spelling of 28392156 in words is "twenty-eight million, three hundred ninety-two thousand, one hundred fifty-six".