28180697 has 8 divisors (see below), whose sum is σ = 28731456. Its totient is φ = 27635472.

The previous prime is 28180687. The next prime is 28180699. The reversal of 28180697 is 79608182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28180697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28180699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9743 + ... + 12299.

It is an arithmetic number, because the mean of its divisors is an integer number (3591432).

Almost surely, 2^28180697 is an apocalyptic number.

It is an amenable number.

28180697 is a deficient number, since it is larger than the sum of its proper divisors (550759).

28180697 is a wasteful number, since it uses less digits than its factorization.

28180697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28180697 is about 5308.5494252197. The cubic root of 28180697 is about 304.3107143151.

The spelling of 28180697 in words is "twenty-eight million, one hundred eighty thousand, six hundred ninety-seven".