28912451 has 8 divisors (see below), whose sum is σ = 29431440. Its totient is φ = 28397952.

The previous prime is 28912381. The next prime is 28912463. The reversal of 28912451 is 15421982.

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-28912451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28912151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13511 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (3678930).

Almost surely, 2^28912451 is an apocalyptic number.

28912451 is a deficient number, since it is larger than the sum of its proper divisors (518989).

28912451 is a wasteful number, since it uses less digits than its factorization.

28912451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245.

The product of its digits is 5760, while the sum is 32.

The square root of 28912451 is about 5377.0299422637. The cubic root of 28912451 is about 306.9222005039.

The spelling of 28912451 in words is "twenty-eight million, nine hundred twelve thousand, four hundred fifty-one".