2630881 has 4 divisors (see below), whose sum is σ = 2870064. Its totient is φ = 2391700.

The previous prime is 2630879. The next prime is 2630891. The reversal of 2630881 is 1880362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2630881 - 2¹ = 2630879 is a prime.

It is a super-2 number, since 2×2630881² = 13843069672322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2630861) 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, 119575 + ... + 119596.

It is an arithmetic number, because the mean of its divisors is an integer number (717516).

2^2630881 is an apocalyptic number.

It is an amenable number.

2630881 is a deficient number, since it is larger than the sum of its proper divisors (239183).

2630881 is a wasteful number, since it uses less digits than its factorization.

2630881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239182.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2630881 is about 1621.9990752155. Note that the first 3 decimals coincide. The cubic root of 2630881 is about 138.0491493349.

The spelling of 2630881 in words is "two million, six hundred thirty thousand, eight hundred eighty-one".