2779264 has 16 divisors (see below), whose sum is σ = 5537070. Its totient is φ = 1389568.

The previous prime is 2779261. The next prime is 2779277. The reversal of 2779264 is 4629772.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2585664 + 193600 = 1608^2 + 440^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10729 + ... + 10984.

2^2779264 is an apocalyptic number.

It is an amenable number.

2779264 is a deficient number, since it is larger than the sum of its proper divisors (2757806).

2779264 is an equidigital number, since it uses as much as digits as its factorization.

2779264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21727 (or 21715 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 2779264 is about 1667.1124737102. The cubic root of 2779264 is about 140.5971769811.

The spelling of 2779264 in words is "two million, seven hundred seventy-nine thousand, two hundred sixty-four".