28236474 has 48 divisors (see below), whose sum is σ = 72184320. Its totient is φ = 7806240.

The previous prime is 28236463. The next prime is 28236491. The reversal of 28236474 is 47463282.

28236474 is a `hidden beast` number, since 2 + 8 + 2 + 3 + 647 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (1503840).

Almost surely, 2^28236474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28236474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36092160).

28236474 is an abundant number, since it is smaller than the sum of its proper divisors (43947846).

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

28236474 is a wasteful number, since it uses less digits than its factorization.

28236474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275 (or 7272 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 28236474 is about 5313.8003349768. The cubic root of 28236474 is about 304.5113522748.

The spelling of 28236474 in words is "twenty-eight million, two hundred thirty-six thousand, four hundred seventy-four".