28172760 has 128 divisors (see below), whose sum is σ = 105408000. Its totient is φ = 5852160.

The previous prime is 28172759. The next prime is 28172803. The reversal of 28172760 is 6727182.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7716 + ... + 10764.

It is an arithmetic number, because the mean of its divisors is an integer number (823500).

Almost surely, 2^28172760 is an apocalyptic number.

28172760 is a gapful number since it is divisible by the number (20) 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 28172760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52704000).

28172760 is an abundant number, since it is smaller than the sum of its proper divisors (77235240).

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

28172760 is a wasteful number, since it uses less digits than its factorization.

28172760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081 (or 3077 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 28172760 is about 5307.8018048906. The cubic root of 28172760 is about 304.2821422642.

The spelling of 28172760 in words is "twenty-eight million, one hundred seventy-two thousand, seven hundred sixty".