28451251 has 8 divisors (see below), whose sum is σ = 30826224. Its totient is φ = 26154240.

The previous prime is 28451243. The next prime is 28451257. The reversal of 28451251 is 15215482.

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 28451251 - 2³ = 28451243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28451257) 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, 18730 + ... + 20191.

It is an arithmetic number, because the mean of its divisors is an integer number (3853278).

Almost surely, 2^28451251 is an apocalyptic number.

28451251 is a deficient number, since it is larger than the sum of its proper divisors (2374973).

28451251 is a wasteful number, since it uses less digits than its factorization.

28451251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38981.

The product of its digits is 3200, while the sum is 28.

The square root of 28451251 is about 5333.9714097472. The cubic root of 28451251 is about 305.2814780341.

It can be divided in two parts, 2845 and 1251, that added together give a 12-th power (4096 = 2¹²).

The spelling of 28451251 in words is "twenty-eight million, four hundred fifty-one thousand, two hundred fifty-one".