28970244 has 96 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 8778240.

The previous prime is 28970243. The next prime is 28970251. The reversal of 28970244 is 44207982.

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

It is a junction number, because it is equal to n+sod(n) for n = 28970199 and 28970208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28970243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56662 + ... + 57170.

It is an arithmetic number, because the mean of its divisors is an integer number (856800).

Almost surely, 2^28970244 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 28970244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41126400).

28970244 is an abundant number, since it is smaller than the sum of its proper divisors (53282556).

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

28970244 is a wasteful number, since it uses less digits than its factorization.

28970244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28970244 is about 5382.4013228298. The cubic root of 28970244 is about 307.1265663100.

The spelling of 28970244 in words is "twenty-eight million, nine hundred seventy thousand, two hundred forty-four".