28648893 has 32 divisors (see below), whose sum is σ = 49787136. Its totient is φ = 14220288.

The previous prime is 28648883. The next prime is 28648901. The reversal of 28648893 is 39884682.

It is a happy number.

It is not a de Polignac number, because 28648893 - 2⁴ = 28648877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1555 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (1555848).

Almost surely, 2^28648893 is an apocalyptic number.

It is an amenable number.

28648893 is a deficient number, since it is larger than the sum of its proper divisors (21138243).

28648893 is a wasteful number, since it uses less digits than its factorization.

28648893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213.

The product of its digits is 663552, while the sum is 48.

The square root of 28648893 is about 5352.4660671507. The cubic root of 28648893 is about 305.9867459764.

The spelling of 28648893 in words is "twenty-eight million, six hundred forty-eight thousand, eight hundred ninety-three".