2690278 has 4 divisors (see below), whose sum is σ = 4035420. Its totient is φ = 1345138.

The previous prime is 2690263. The next prime is 2690293. The reversal of 2690278 is 8720962.

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

It is an interprime number because it is at equal distance from previous prime (2690263) and next prime (2690293).

It is an Ulam number.

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, 672568 + ... + 672571.

It is an arithmetic number, because the mean of its divisors is an integer number (1008855).

2^2690278 is an apocalyptic number.

2690278 is a deficient number, since it is larger than the sum of its proper divisors (1345142).

2690278 is a wasteful number, since it uses less digits than its factorization.

2690278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345141.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 2690278 is about 1640.2066942919. The cubic root of 2690278 is about 139.0803324268.

The spelling of 2690278 in words is "two million, six hundred ninety thousand, two hundred seventy-eight".