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2315989 = 13672659
BaseRepresentation
bin1000110101011011010101
311100122221101
420311123111
51043102424
6121350101
725454104
oct10653325
94318841
102315989
111342045
12938331
13631210
1444403b
1530b344
hex2356d5

2315989 has 8 divisors (see below), whose sum is σ = 2532320. Its totient is φ = 2105136.

The previous prime is 2315983. The next prime is 2315993. The reversal of 2315989 is 9895132.

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 2315989 - 23 = 2315981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2315981) 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, 459 + ... + 2200.

It is an arithmetic number, because the mean of its divisors is an integer number (316540).

22315989 is an apocalyptic number.

It is an amenable number.

2315989 is a deficient number, since it is larger than the sum of its proper divisors (216331).

2315989 is a wasteful number, since it uses less digits than its factorization.

2315989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739.

The product of its digits is 19440, while the sum is 37.

The square root of 2315989 is about 1521.8373763316. The cubic root of 2315989 is about 132.3057840501.

The spelling of 2315989 in words is "two million, three hundred fifteen thousand, nine hundred eighty-nine".

Divisors: 1 13 67 871 2659 34567 178153 2315989