28274398 has 4 divisors (see below), whose sum is σ = 42411600. Its totient is φ = 14137198.

The previous prime is 28274381. The next prime is 28274431. The reversal of 28274398 is 89347282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7068598 + ... + 7068601.

It is an arithmetic number, because the mean of its divisors is an integer number (10602900).

Almost surely, 2^28274398 is an apocalyptic number.

28274398 is a deficient number, since it is larger than the sum of its proper divisors (14137202).

28274398 is a wasteful number, since it uses less digits than its factorization.

28274398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14137201.

The product of its digits is 193536, while the sum is 43.

The square root of 28274398 is about 5317.3675818021. The cubic root of 28274398 is about 304.6476195517.

It can be divided in two parts, 2827 and 4398, that added together give a square (7225 = 85²).

The spelling of 28274398 in words is "twenty-eight million, two hundred seventy-four thousand, three hundred ninety-eight".