28488685 has 8 divisors (see below), whose sum is σ = 36197496. Its totient is φ = 21450240.

The previous prime is 28488653. The next prime is 28488703. The reversal of 28488685 is 58688482.

It can be written as a sum of positive squares in 4 ways, for example, as 4888521 + 23600164 = 2211^2 + 4858^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28488685 - 2⁵ = 28488653 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 167496 + ... + 167665.

It is an arithmetic number, because the mean of its divisors is an integer number (4524687).

Almost surely, 2^28488685 is an apocalyptic number.

It is an amenable number.

28488685 is a deficient number, since it is larger than the sum of its proper divisors (7708811).

28488685 is a wasteful number, since it uses less digits than its factorization.

28488685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335183.

The product of its digits is 983040, while the sum is 49.

The square root of 28488685 is about 5337.4792739644. The cubic root of 28488685 is about 305.4153081015.

The spelling of 28488685 in words is "twenty-eight million, four hundred eighty-eight thousand, six hundred eighty-five".