28718573 has 8 divisors (see below), whose sum is σ = 31682616. Its totient is φ = 25862400.

The previous prime is 28718567. The next prime is 28718579. The reversal of 28718573 is 37581782.

It is an interprime number because it is at equal distance from previous prime (28718567) and next prime (28718579).

It can be written as a sum of positive squares in 4 ways, for example, as 128164 + 28590409 = 358^2 + 5347^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28718573 - 2⁶ = 28718509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28718573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26408 + ... + 27473.

It is an arithmetic number, because the mean of its divisors is an integer number (3960327).

Almost surely, 2^28718573 is an apocalyptic number.

It is an amenable number.

28718573 is a deficient number, since it is larger than the sum of its proper divisors (2964043).

28718573 is a wasteful number, since it uses less digits than its factorization.

28718573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53935.

The product of its digits is 94080, while the sum is 41.

The square root of 28718573 is about 5358.9712632183. The cubic root of 28718573 is about 306.2346193581.

The spelling of 28718573 in words is "twenty-eight million, seven hundred eighteen thousand, five hundred seventy-three".