2780706 has 8 divisors (see below), whose sum is σ = 5561424. Its totient is φ = 926900.

The previous prime is 2780693. The next prime is 2780719. The reversal of 2780706 is 6070872.

It is an interprime number because it is at equal distance from previous prime (2780693) and next prime (2780719).

It is a sphenic number, since it is the product of 3 distinct primes.

2780706 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231720 + ... + 231731.

It is an arithmetic number, because the mean of its divisors is an integer number (695178).

2^2780706 is an apocalyptic number.

2780706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2780706 is a wasteful number, since it uses less digits than its factorization.

2780706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463456.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 2780706 is about 1667.5449019442. The cubic root of 2780706 is about 140.6214887024.

It can be divided in two parts, 2780 and 706, that added together give a triangular number (3486 = T₈₃).

The spelling of 2780706 in words is "two million, seven hundred eighty thousand, seven hundred six".