2779664 has 10 divisors (see below), whose sum is σ = 5385630. Its totient is φ = 1389824.

The previous prime is 2779663. The next prime is 2779669. The reversal of 2779664 is 4669772.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 984064 = 1340^2 + 992^2 .

It is not an unprimeable number, because it can be changed into a prime (2779663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86849 + ... + 86880.

It is an arithmetic number, because the mean of its divisors is an integer number (538563).

2^2779664 is an apocalyptic number.

It is an amenable number.

2779664 is a deficient number, since it is larger than the sum of its proper divisors (2605966).

2779664 is a wasteful number, since it uses less digits than its factorization.

2779664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173737 (or 173731 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 2779664 is about 1667.2324373044. The cubic root of 2779664 is about 140.6039217132.

It can be divided in two parts, 2779 and 664, that added together give a palindrome (3443).

The spelling of 2779664 in words is "two million, seven hundred seventy-nine thousand, six hundred sixty-four".