2687764 has 6 divisors (see below), whose sum is σ = 4703594. Its totient is φ = 1343880.

The previous prime is 2687761. The next prime is 2687767. The reversal of 2687764 is 4677862.

It is an interprime number because it is at equal distance from previous prime (2687761) and next prime (2687767).

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 608400 = 1442^2 + 780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687761) 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, 335967 + ... + 335974.

2^2687764 is an apocalyptic number.

It is an amenable number.

2687764 is a deficient number, since it is larger than the sum of its proper divisors (2015830).

2687764 is a wasteful number, since it uses less digits than its factorization.

2687764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671945 (or 671943 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 2687764 is about 1639.4401483433. The cubic root of 2687764 is about 139.0369965182.

The spelling of 2687764 in words is "two million, six hundred eighty-seven thousand, seven hundred sixty-four".