2797640 has 16 divisors (see below), whose sum is σ = 6294780. Its totient is φ = 1119040.

The previous prime is 2797637. The next prime is 2797667. The reversal of 2797640 is 467972.

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 244036 = 1598^2 + 494^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2797640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34931 + ... + 35010.

2^2797640 is an apocalyptic number.

2797640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2797640 is an abundant number, since it is smaller than the sum of its proper divisors (3497140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2797640 is a wasteful number, since it uses less digits than its factorization.

2797640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69952 (or 69948 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 2797640 is about 1672.6147195335. The cubic root of 2797640 is about 140.9063644035.

The spelling of 2797640 in words is "two million, seven hundred ninety-seven thousand, six hundred forty".