28355392 has 56 divisors (see below), whose sum is σ = 61255656. Its totient is φ = 12945408.

The previous prime is 28355387. The next prime is 28355399. The reversal of 28355392 is 29355382.

It can be written as a sum of positive squares in 4 ways, for example, as 13424896 + 14930496 = 3664^2 + 3864^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28355399) 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, 143838 + ... + 144034.

It is an arithmetic number, because the mean of its divisors is an integer number (1093851).

Almost surely, 2^28355392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28355392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30627828).

28355392 is an abundant number, since it is smaller than the sum of its proper divisors (32900264).

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

28355392 is a wasteful number, since it uses less digits than its factorization.

28355392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 385 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 28355392 is about 5324.9781220208. The cubic root of 28355392 is about 304.9382370683.

The spelling of 28355392 in words is "twenty-eight million, three hundred fifty-five thousand, three hundred ninety-two".