28857944 has 16 divisors (see below), whose sum is σ = 54261600. Its totient is φ = 14388192.

The previous prime is 28857937. The next prime is 28857947. The reversal of 28857944 is 44975882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979 + ... + 7850.

It is an arithmetic number, because the mean of its divisors is an integer number (3391350).

Almost surely, 2^28857944 is an apocalyptic number.

It is an amenable number.

28857944 is a deficient number, since it is larger than the sum of its proper divisors (25403656).

28857944 is a wasteful number, since it uses less digits than its factorization.

28857944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202 (or 10198 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 28857944 is about 5371.9590467538. The cubic root of 28857944 is about 306.7292048471.

It can be divided in two parts, 2885794 and 4, that multiplied together give a cube (11543176 = 226³).

The spelling of 28857944 in words is "twenty-eight million, eight hundred fifty-seven thousand, nine hundred forty-four".