2661392 has 20 divisors (see below), whose sum is σ = 5283516. Its totient is φ = 1297920.

The previous prime is 2661391. The next prime is 2661397. The reversal of 2661392 is 2931662.

It can be written as a sum of positive squares in 2 ways, for example, as 633616 + 2027776 = 796^2 + 1424^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2661391) 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 in 3 ways as a sum of consecutive naturals, for example, 1373 + ... + 2684.

2^2661392 is an apocalyptic number.

It is an amenable number.

2661392 is a deficient number, since it is larger than the sum of its proper divisors (2622124).

2661392 is a wasteful number, since it uses less digits than its factorization.

2661392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106 (or 4100 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 2661392 is about 1631.3773321951. The cubic root of 2661392 is about 138.5807632801.

The spelling of 2661392 in words is "two million, six hundred sixty-one thousand, three hundred ninety-two".