28634815 has 8 divisors (see below), whose sum is σ = 37485648. Its totient is φ = 20825280.

The previous prime is 28634777. The next prime is 28634819. The reversal of 28634815 is 51843682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28634815 - 2¹⁵ = 28602047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28634819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260262 + ... + 260371.

It is an arithmetic number, because the mean of its divisors is an integer number (4685706).

Almost surely, 2^28634815 is an apocalyptic number.

28634815 is a deficient number, since it is larger than the sum of its proper divisors (8850833).

28634815 is a wasteful number, since it uses less digits than its factorization.

28634815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520649.

The product of its digits is 46080, while the sum is 37.

The square root of 28634815 is about 5351.1508108070. The cubic root of 28634815 is about 305.9366173705.

The spelling of 28634815 in words is "twenty-eight million, six hundred thirty-four thousand, eight hundred fifteen".