28890315 has 24 divisors (see below), whose sum is σ = 50367408. Its totient is φ = 15318720.

The previous prime is 28890311. The next prime is 28890349. The reversal of 28890315 is 51309882.

It is not a de Polignac number, because 28890315 - 2² = 28890311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28890315.

It is not an unprimeable number, because it can be changed into a prime (28890311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6372 + ... + 9918.

It is an arithmetic number, because the mean of its divisors is an integer number (2098642).

Almost surely, 2^28890315 is an apocalyptic number.

28890315 is a deficient number, since it is larger than the sum of its proper divisors (21477093).

28890315 is a wasteful number, since it uses less digits than its factorization.

28890315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739 (or 3736 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 28890315 is about 5374.9711627133. The cubic root of 28890315 is about 306.8438517393.

The spelling of 28890315 in words is "twenty-eight million, eight hundred ninety thousand, three hundred fifteen".