28049817 has 8 divisors (see below), whose sum is σ = 37428480. Its totient is φ = 18685520.

The previous prime is 28049809. The next prime is 28049849. The reversal of 28049817 is 71894082.

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 28049817 - 2³ = 28049809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28049807) 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, 2392 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (4678560).

Almost surely, 2^28049817 is an apocalyptic number.

It is an amenable number.

28049817 is a deficient number, since it is larger than the sum of its proper divisors (9378663).

28049817 is a wasteful number, since it uses less digits than its factorization.

28049817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 28049817 is about 5296.2077942619. The cubic root of 28049817 is about 303.8388782912.

It can be divided in two parts, 2804 and 9817, that added together give a palindrome (12621).

The spelling of 28049817 in words is "twenty-eight million, forty-nine thousand, eight hundred seventeen".