28463238 has 20 divisors (see below), whose sum is σ = 63779100. Its totient is φ = 9487692.

The previous prime is 28463221. The next prime is 28463263. The reversal of 28463238 is 83236482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 87688 + ... + 88011.

It is an arithmetic number, because the mean of its divisors is an integer number (3188955).

Almost surely, 2^28463238 is an apocalyptic number.

28463238 is an abundant number, since it is smaller than the sum of its proper divisors (35315862).

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

28463238 is a wasteful number, since it uses less digits than its factorization.

28463238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175713 (or 175704 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28463238 is about 5335.0949382368. The cubic root of 28463238 is about 305.3243454552.

It can be divided in two parts, 2846 and 3238, that added together give a square (6084 = 78²).

The spelling of 28463238 in words is "twenty-eight million, four hundred sixty-three thousand, two hundred thirty-eight".