28885451 has 12 divisors (see below), whose sum is σ = 33851160. Its totient is φ = 24575040.

The previous prime is 28885433. The next prime is 28885471. The reversal of 28885451 is 15458882.

It is a happy number.

It is not a de Polignac number, because 28885451 - 2¹⁸ = 28623307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28885399 and 28885408.

It is not an unprimeable number, because it can be changed into a prime (28885471) 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 11 ways as a sum of consecutive naturals, for example, 4691 + ... + 8931.

It is an arithmetic number, because the mean of its divisors is an integer number (2820930).

Almost surely, 2^28885451 is an apocalyptic number.

28885451 is a deficient number, since it is larger than the sum of its proper divisors (4965709).

28885451 is a wasteful number, since it uses less digits than its factorization.

28885451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394 (or 4387 counting only the distinct ones).

The product of its digits is 102400, while the sum is 41.

The square root of 28885451 is about 5374.5186761235. The cubic root of 28885451 is about 306.8266306018.

The spelling of 28885451 in words is "twenty-eight million, eight hundred eighty-five thousand, four hundred fifty-one".