2815994 has 4 divisors (see below), whose sum is σ = 4223994. Its totient is φ = 1407996.

The previous prime is 2815993. The next prime is 2815997. The reversal of 2815994 is 4995182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4995182 = 2 ⋅2497591.

It can be written as a sum of positive squares in only one way, i.e., 1723969 + 1092025 = 1313^2 + 1045^2 .

It is not an unprimeable number, because it can be changed into a prime (2815993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703997 + ... + 704000.

2^2815994 is an apocalyptic number.

2815994 is a deficient number, since it is larger than the sum of its proper divisors (1408000).

2815994 is a wasteful number, since it uses less digits than its factorization.

2815994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407999.

The product of its digits is 25920, while the sum is 38.

The square root of 2815994 is about 1678.0923693289. The cubic root of 2815994 is about 141.2138331190.

The spelling of 2815994 in words is "two million, eight hundred fifteen thousand, nine hundred ninety-four".