2780847 has 12 divisors (see below), whose sum is σ = 4085640. Its totient is φ = 1822128.

The previous prime is 2780837. The next prime is 2780873. The reversal of 2780847 is 7480872.

It is not a de Polignac number, because 2780847 - 2⁴ = 2780831 is a prime.

It is a super-2 number, since 2×2780847² = 15466220074818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780837) 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, 2088 + ... + 3149.

It is an arithmetic number, because the mean of its divisors is an integer number (340470).

2^2780847 is an apocalyptic number.

2780847 is a deficient number, since it is larger than the sum of its proper divisors (1304793).

2780847 is a wasteful number, since it uses less digits than its factorization.

2780847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 2780847 is about 1667.5871791304. The cubic root of 2780847 is about 140.6238654723.

The spelling of 2780847 in words is "two million, seven hundred eighty thousand, eight hundred forty-seven".