28561944 has 16 divisors (see below), whose sum is σ = 71404920. Its totient is φ = 9520640.

The previous prime is 28561931. The next prime is 28561957. The reversal of 28561944 is 44916582.

It is an interprime number because it is at equal distance from previous prime (28561931) and next prime (28561957).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595017 + ... + 595064.

Almost surely, 2^28561944 is an apocalyptic number.

28561944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28561944 is an abundant number, since it is smaller than the sum of its proper divisors (42842976).

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

28561944 is a wasteful number, since it uses less digits than its factorization.

28561944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190090 (or 1190086 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28561944 is about 5344.3375641888. The cubic root of 28561944 is about 305.6768770801.

The spelling of 28561944 in words is "twenty-eight million, five hundred sixty-one thousand, nine hundred forty-four".