28485815 has 8 divisors (see below), whose sum is σ = 34212048. Its totient is φ = 22769280.

The previous prime is 28485811. The next prime is 28485851. The reversal of 28485815 is 51858482.

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 28485815 - 2² = 28485811 is a prime.

It is a super-2 number, since 2×28485815² = 1622883312428450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485811) 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, 8639 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (4276506).

Almost surely, 2^28485815 is an apocalyptic number.

28485815 is a deficient number, since it is larger than the sum of its proper divisors (5726233).

28485815 is a wasteful number, since it uses less digits than its factorization.

28485815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849.

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

The square root of 28485815 is about 5337.2104136899. The cubic root of 28485815 is about 305.4050517328.

The spelling of 28485815 in words is "twenty-eight million, four hundred eighty-five thousand, eight hundred fifteen".