2788061 has 4 divisors (see below), whose sum is σ = 2863452. Its totient is φ = 2712672.

The previous prime is 2788057. The next prime is 2788069. The reversal of 2788061 is 1608872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 244036 = 1595^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 2788061 - 2² = 2788057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37640 + ... + 37713.

It is an arithmetic number, because the mean of its divisors is an integer number (715863).

2^2788061 is an apocalyptic number.

It is an amenable number.

2788061 is a deficient number, since it is larger than the sum of its proper divisors (75391).

2788061 is an equidigital number, since it uses as much as digits as its factorization.

2788061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75390.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2788061 is about 1669.7487835001. The cubic root of 2788061 is about 140.7453613809.

It can be divided in two parts, 27 and 88061, that added together give a palindrome (88088).

The spelling of 2788061 in words is "two million, seven hundred eighty-eight thousand, sixty-one".