28070944 has 48 divisors (see below), whose sum is σ = 63848736. Its totient is φ = 12006400.

The previous prime is 28070941. The next prime is 28070951. The reversal of 28070944 is 44907082.

It is a happy number.

It is a super-2 number, since 2×28070944² = 1575955794102272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (28070941) 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, 3639 + ... + 8329.

It is an arithmetic number, because the mean of its divisors is an integer number (1330182).

Almost surely, 2^28070944 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 28070944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31924368).

28070944 is an abundant number, since it is smaller than the sum of its proper divisors (35777792).

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

28070944 is a wasteful number, since it uses less digits than its factorization.

28070944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729 (or 4721 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28070944 is about 5298.2019591556. The cubic root of 28070944 is about 303.9151425204.

The spelling of 28070944 in words is "twenty-eight million, seventy thousand, nine hundred forty-four".