28713345 has 16 divisors (see below), whose sum is σ = 46008000. Its totient is φ = 15291584.

The previous prime is 28713337. The next prime is 28713359. The reversal of 28713345 is 54331782.

It is a cyclic number.

It is not a de Polignac number, because 28713345 - 2³ = 28713337 is a prime.

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, 18406 + ... + 19904.

It is an arithmetic number, because the mean of its divisors is an integer number (2875500).

Almost surely, 2^28713345 is an apocalyptic number.

It is an amenable number.

28713345 is a deficient number, since it is larger than the sum of its proper divisors (17294655).

28713345 is a wasteful number, since it uses less digits than its factorization.

28713345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784.

The product of its digits is 20160, while the sum is 33.

The square root of 28713345 is about 5358.4834608311. The cubic root of 28713345 is about 306.2160356614.

It can be divided in two parts, 2871 and 3345, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 28713345 in words is "twenty-eight million, seven hundred thirteen thousand, three hundred forty-five".