28345751 has 8 divisors (see below), whose sum is σ = 32716704. Its totient is φ = 24055200.

The previous prime is 28345741. The next prime is 28345763. The reversal of 28345751 is 15754382.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28345751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345721) 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, 19340 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (4089588).

Almost surely, 2^28345751 is an apocalyptic number.

28345751 is a deficient number, since it is larger than the sum of its proper divisors (4370953).

28345751 is a wasteful number, since it uses less digits than its factorization.

28345751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40201.

The product of its digits is 33600, while the sum is 35.

The square root of 28345751 is about 5324.0727831238. The cubic root of 28345751 is about 304.9036728861.

The spelling of 28345751 in words is "twenty-eight million, three hundred forty-five thousand, seven hundred fifty-one".