28923615 has 64 divisors (see below), whose sum is σ = 59473920. Its totient is φ = 13063680.

The previous prime is 28923607. The next prime is 28923617. The reversal of 28923615 is 51632982.

It is not a de Polignac number, because 28923615 - 2³ = 28923607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28923615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28923617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119895 + ... + 120135.

It is an arithmetic number, because the mean of its divisors is an integer number (929280).

Almost surely, 2^28923615 is an apocalyptic number.

28923615 is an abundant number, since it is smaller than the sum of its proper divisors (30550305).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28923615 is a wasteful number, since it uses less digits than its factorization.

28923615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 383 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28923615 is about 5378.0679616383. The cubic root of 28923615 is about 306.9616995017.

The spelling of 28923615 in words is "twenty-eight million, nine hundred twenty-three thousand, six hundred fifteen".