28988985 has 8 divisors (see below), whose sum is σ = 46382400. Its totient is φ = 15460784.

The previous prime is 28988977. The next prime is 28989007. The reversal of 28988985 is 58988982.

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 28988985 - 2³ = 28988977 is a prime.

It is a super-2 number, since 2×28988985² = 1680722502660450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966285 + ... + 966314.

It is an arithmetic number, because the mean of its divisors is an integer number (5797800).

Almost surely, 2^28988985 is an apocalyptic number.

It is an amenable number.

28988985 is a deficient number, since it is larger than the sum of its proper divisors (17393415).

28988985 is a wasteful number, since it uses less digits than its factorization.

28988985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932607.

The product of its digits is 3317760, while the sum is 57.

The square root of 28988985 is about 5384.1419929270. The cubic root of 28988985 is about 307.1927792865.

The spelling of 28988985 in words is "twenty-eight million, nine hundred eighty-eight thousand, nine hundred eighty-five".