28252651 has 4 divisors (see below), whose sum is σ = 32288752. Its totient is φ = 24216552.

The previous prime is 28252613. The next prime is 28252661. The reversal of 28252651 is 15625282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28252651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28252661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018040 + ... + 2018053.

It is an arithmetic number, because the mean of its divisors is an integer number (8072188).

Almost surely, 2^28252651 is an apocalyptic number.

28252651 is a deficient number, since it is larger than the sum of its proper divisors (4036101).

28252651 is an equidigital number, since it uses as much as digits as its factorization.

28252651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036100.

The product of its digits is 9600, while the sum is 31.

The square root of 28252651 is about 5315.3222856192. The cubic root of 28252651 is about 304.5694938557.

It can be divided in two parts, 2825 and 2651, that added together give a square (5476 = 74²).

The spelling of 28252651 in words is "twenty-eight million, two hundred fifty-two thousand, six hundred fifty-one".