28874609 has 8 divisors (see below), whose sum is σ = 30024960. Its totient is φ = 27738000.

The previous prime is 28874603. The next prime is 28874611. The reversal of 28874609 is 90647882.

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

It is a cyclic number.

It is not a de Polignac number, because 28874609 - 2⁸ = 28874353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28874609.

It is not an unprimeable number, because it can be changed into a prime (28874603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 7659.

It is an arithmetic number, because the mean of its divisors is an integer number (3753120).

Almost surely, 2^28874609 is an apocalyptic number.

It is an amenable number.

28874609 is a deficient number, since it is larger than the sum of its proper divisors (1150351).

28874609 is a wasteful number, since it uses less digits than its factorization.

28874609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 28874609 is about 5373.5099329954. The cubic root of 28874609 is about 306.7882372179.

The spelling of 28874609 in words is "twenty-eight million, eight hundred seventy-four thousand, six hundred nine".