28905744 has 40 divisors (see below), whose sum is σ = 85341760. Its totient is φ = 8258688.

The previous prime is 28905731. The next prime is 28905757. The reversal of 28905744 is 44750982.

It is an interprime number because it is at equal distance from previous prime (28905731) and next prime (28905757).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42679 + ... + 43350.

It is an arithmetic number, because the mean of its divisors is an integer number (2133544).

Almost surely, 2^28905744 is an apocalyptic number.

28905744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28905744 is an abundant number, since it is smaller than the sum of its proper divisors (56436016).

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

28905744 is a wasteful number, since it uses less digits than its factorization.

28905744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86047 (or 86041 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28905744 is about 5376.4062346515. The cubic root of 28905744 is about 306.8984657884.

The spelling of 28905744 in words is "twenty-eight million, nine hundred five thousand, seven hundred forty-four".