28995181 has 8 divisors (see below), whose sum is σ = 29566944. Its totient is φ = 28429200.

The previous prime is 28995179. The next prime is 28995209. The reversal of 28995181 is 18159982.

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 28995181 - 2¹ = 28995179 is a prime.

It is a super-2 number, since 2×28995181² = 1681441042445522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28995151) 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, 9466 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (3695868).

Almost surely, 2^28995181 is an apocalyptic number.

It is an amenable number.

28995181 is a deficient number, since it is larger than the sum of its proper divisors (571763).

28995181 is a wasteful number, since it uses less digits than its factorization.

28995181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891.

The product of its digits is 51840, while the sum is 43.

The square root of 28995181 is about 5384.7173556279. The cubic root of 28995181 is about 307.2146638158.

The spelling of 28995181 in words is "twenty-eight million, nine hundred ninety-five thousand, one hundred eighty-one".