28209374 has 4 divisors (see below), whose sum is σ = 42314064. Its totient is φ = 14104686.

The previous prime is 28209359. The next prime is 28209397. The reversal of 28209374 is 47390282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47390282 = 2 ⋅23695141.

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, 7052342 + ... + 7052345.

It is an arithmetic number, because the mean of its divisors is an integer number (10578516).

Almost surely, 2^28209374 is an apocalyptic number.

28209374 is a deficient number, since it is larger than the sum of its proper divisors (14104690).

28209374 is a wasteful number, since it uses less digits than its factorization.

28209374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14104689.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28209374 is about 5311.2497587668. The cubic root of 28209374 is about 304.4139026771.

The spelling of 28209374 in words is "twenty-eight million, two hundred nine thousand, three hundred seventy-four".