28070252 has 48 divisors (see below), whose sum is σ = 58877952. Its totient is φ = 11456640.

The previous prime is 28070249. The next prime is 28070257. The reversal of 28070252 is 25207082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63143 + ... + 63585.

It is an arithmetic number, because the mean of its divisors is an integer number (1226624).

Almost surely, 2^28070252 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 28070252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29438976).

28070252 is an abundant number, since it is smaller than the sum of its proper divisors (30807700).

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

28070252 is a wasteful number, since it uses less digits than its factorization.

28070252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 28070252 is about 5298.1366535793. The cubic root of 28070252 is about 303.9126451455.

The spelling of 28070252 in words is "twenty-eight million, seventy thousand, two hundred fifty-two".