28815429 has 8 divisors (see below), whose sum is σ = 38455200. Its totient is φ = 19192976.

The previous prime is 28815407. The next prime is 28815443. The reversal of 28815429 is 92451882.

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 28815429 - 2⁸ = 28815173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28815469) 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, 247 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (4806900).

Almost surely, 2^28815429 is an apocalyptic number.

It is an amenable number.

28815429 is a deficient number, since it is larger than the sum of its proper divisors (9639771).

28815429 is a wasteful number, since it uses less digits than its factorization.

28815429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8659.

The product of its digits is 46080, while the sum is 39.

The square root of 28815429 is about 5368.0004657228. Note that the first 3 decimals coincide. The cubic root of 28815429 is about 306.5785010939.

The spelling of 28815429 in words is "twenty-eight million, eight hundred fifteen thousand, four hundred twenty-nine".