28840744 has 8 divisors (see below), whose sum is σ = 54076410. Its totient is φ = 14420368.

The previous prime is 28840699. The next prime is 28840769. The reversal of 28840744 is 44704882.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 3844 = 5370^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1802539 + ... + 1802554.

Almost surely, 2^28840744 is an apocalyptic number.

It is an amenable number.

28840744 is a deficient number, since it is larger than the sum of its proper divisors (25235666).

28840744 is a wasteful number, since it uses less digits than its factorization.

28840744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605099 (or 3605095 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 28840744 is about 5370.3579024121. The cubic root of 28840744 is about 306.6682535100.

It can be divided in two parts, 28840 and 744, that added together give a square (29584 = 172²).

The spelling of 28840744 in words is "twenty-eight million, eight hundred forty thousand, seven hundred forty-four".