2738991 has 8 divisors (see below), whose sum is σ = 3670144. Its totient is φ = 1816920.

The previous prime is 2738947. The next prime is 2739013. The reversal of 2738991 is 1998372.

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

It is a de Polignac number, because none of the positive numbers 2^k-2738991 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 (2738941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (458768).

2^2738991 is an apocalyptic number.

2738991 is a deficient number, since it is larger than the sum of its proper divisors (931153).

2738991 is a wasteful number, since it uses less digits than its factorization.

2738991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541.

The product of its digits is 27216, while the sum is 39.

The square root of 2738991 is about 1654.9897280648. The cubic root of 2738991 is about 139.9147610380.

The spelling of 2738991 in words is "two million, seven hundred thirty-eight thousand, nine hundred ninety-one".