28475238 has 64 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 7910400.

The previous prime is 28475203. The next prime is 28475261. The reversal of 28475238 is 83257482.

It is a junction number, because it is equal to n+sod(n) for n = 28475196 and 28475205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45693 + ... + 46311.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^28475238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28475238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

28475238 is an abundant number, since it is smaller than the sum of its proper divisors (39020442).

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

28475238 is a wasteful number, since it uses less digits than its factorization.

28475238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its digits is 107520, while the sum is 39.

The square root of 28475238 is about 5336.2194482611. The cubic root of 28475238 is about 305.3672473130.

The spelling of 28475238 in words is "twenty-eight million, four hundred seventy-five thousand, two hundred thirty-eight".