28820615 has 16 divisors (see below), whose sum is σ = 35458560. Its totient is φ = 22480800.

The previous prime is 28820569. The next prime is 28820629. The reversal of 28820615 is 51602882.

It is not a de Polignac number, because 28820615 - 2¹² = 28816519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44222 + ... + 44868.

It is an arithmetic number, because the mean of its divisors is an integer number (2216160).

Almost surely, 2^28820615 is an apocalyptic number.

28820615 is a deficient number, since it is larger than the sum of its proper divisors (6637945).

28820615 is a wasteful number, since it uses less digits than its factorization.

28820615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28820615 is about 5368.4834916390. The cubic root of 28820615 is about 306.5968919444.

The spelling of 28820615 in words is "twenty-eight million, eight hundred twenty thousand, six hundred fifteen".