28613451 has 4 divisors (see below), whose sum is σ = 38151272. Its totient is φ = 19075632.

The previous prime is 28613441. The next prime is 28613461. The reversal of 28613451 is 15431682.

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

It is an interprime number because it is at equal distance from previous prime (28613441) and next prime (28613461).

It is not a de Polignac number, because 28613451 - 2⁵ = 28613419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28613441) 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, 4768906 + ... + 4768911.

It is an arithmetic number, because the mean of its divisors is an integer number (9537818).

Almost surely, 2^28613451 is an apocalyptic number.

28613451 is a deficient number, since it is larger than the sum of its proper divisors (9537821).

28613451 is an equidigital number, since it uses as much as digits as its factorization.

28613451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537820.

The product of its digits is 5760, while the sum is 30.

The square root of 28613451 is about 5349.1542322128. The cubic root of 28613451 is about 305.8605135549.

The spelling of 28613451 in words is "twenty-eight million, six hundred thirteen thousand, four hundred fifty-one".