2757989 has 8 divisors (see below), whose sum is σ = 2983512. Its totient is φ = 2534400.

The previous prime is 2757917. The next prime is 2758003. The reversal of 2757989 is 9897572.

It can be written as a sum of positive squares in 4 ways, for example, as 302500 + 2455489 = 550^2 + 1567^2 .

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-2757989 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 (2757889) 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, 4289 + ... + 4889.

It is an arithmetic number, because the mean of its divisors is an integer number (372939).

2^2757989 is an apocalyptic number.

It is an amenable number.

2757989 is a deficient number, since it is larger than the sum of its proper divisors (225523).

2757989 is a wasteful number, since it uses less digits than its factorization.

2757989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its digits is 317520, while the sum is 47.

The square root of 2757989 is about 1660.7194224191. The cubic root of 2757989 is about 140.2375050166.

The spelling of 2757989 in words is "two million, seven hundred fifty-seven thousand, nine hundred eighty-nine".