28270396 has 48 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 10941120.

The previous prime is 28270391. The next prime is 28270421. The reversal of 28270396 is 69307282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28270391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80830 + ... + 81178.

It is an arithmetic number, because the mean of its divisors is an integer number (1293600).

Almost surely, 2^28270396 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 28270396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

28270396 is an abundant number, since it is smaller than the sum of its proper divisors (33822404).

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

28270396 is a wasteful number, since it uses less digits than its factorization.

28270396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28270396 is about 5316.9912544596. The cubic root of 28270396 is about 304.6332454490.

The spelling of 28270396 in words is "twenty-eight million, two hundred seventy thousand, three hundred ninety-six".