2792781 has 12 divisors (see below), whose sum is σ = 4054752. Its totient is φ = 1852296.

The previous prime is 2792773. The next prime is 2792809. The reversal of 2792781 is 1872972.

It is not a de Polignac number, because 2792781 - 2³ = 2792773 is a prime.

It is a super-2 number, since 2×2792781² = 15599251427922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2792711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1360 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (337896).

2^2792781 is an apocalyptic number.

It is an amenable number.

2792781 is a deficient number, since it is larger than the sum of its proper divisors (1261971).

2792781 is a wasteful number, since it uses less digits than its factorization.

2792781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1597 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2792781 is about 1671.1615720809. The cubic root of 2792781 is about 140.8247407508.

The spelling of 2792781 in words is "two million, seven hundred ninety-two thousand, seven hundred eighty-one".