2991838 has 4 divisors (see below), whose sum is σ = 4487760. Its totient is φ = 1495918.

The previous prime is 2991803. The next prime is 2991853. The reversal of 2991838 is 8381992.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2991838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747958 + ... + 747961.

It is an arithmetic number, because the mean of its divisors is an integer number (1121940).

2^2991838 is an apocalyptic number.

2991838 is a deficient number, since it is larger than the sum of its proper divisors (1495922).

2991838 is a wasteful number, since it uses less digits than its factorization.

2991838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495921.

The product of its digits is 31104, while the sum is 40.

The square root of 2991838 is about 1729.6930363507. The cubic root of 2991838 is about 144.0940422226.

The spelling of 2991838 in words is "two million, nine hundred ninety-one thousand, eight hundred thirty-eight".