28404274 has 8 divisors (see below), whose sum is σ = 42703920. Its totient is φ = 14169636.

The previous prime is 28404269. The next prime is 28404281. The reversal of 28404274 is 47240482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15144 + ... + 16915.

It is an arithmetic number, because the mean of its divisors is an integer number (5337990).

Almost surely, 2^28404274 is an apocalyptic number.

28404274 is a deficient number, since it is larger than the sum of its proper divisors (14299646).

28404274 is a wasteful number, since it uses less digits than its factorization.

28404274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32504.

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 28404274 is about 5329.5660236083. The cubic root of 28404274 is about 305.1133646489.

The spelling of 28404274 in words is "twenty-eight million, four hundred four thousand, two hundred seventy-four".