28900815 has 8 divisors (see below), whose sum is σ = 46241328. Its totient is φ = 15413760.

The previous prime is 28900801. The next prime is 28900829. The reversal of 28900815 is 51800982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28900801) and next prime (28900829).

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

It is not a de Polignac number, because 28900815 - 2¹⁰ = 28899791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963346 + ... + 963375.

It is an arithmetic number, because the mean of its divisors is an integer number (5780166).

Almost surely, 2^28900815 is an apocalyptic number.

28900815 is a deficient number, since it is larger than the sum of its proper divisors (17340513).

28900815 is a wasteful number, since it uses less digits than its factorization.

28900815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926729.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 28900815 is about 5375.9478234075. The cubic root of 28900815 is about 306.8810207144.

The spelling of 28900815 in words is "twenty-eight million, nine hundred thousand, eight hundred fifteen".