28453815 has 64 divisors (see below), whose sum is σ = 56340480. Its totient is φ = 13530240.

The previous prime is 28453793. The next prime is 28453823. The reversal of 28453815 is 51835482.

It is a happy number.

It is not a de Polignac number, because 28453815 - 2⁶ = 28453751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28453815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54144 + ... + 54666.

It is an arithmetic number, because the mean of its divisors is an integer number (880320).

Almost surely, 2^28453815 is an apocalyptic number.

28453815 is a deficient number, since it is larger than the sum of its proper divisors (27886665).

28453815 is a wasteful number, since it uses less digits than its factorization.

28453815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 575 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 28453815 is about 5334.2117505776. The cubic root of 28453815 is about 305.2906483186.

The spelling of 28453815 in words is "twenty-eight million, four hundred fifty-three thousand, eight hundred fifteen".