2687890 has 8 divisors (see below), whose sum is σ = 4838220. Its totient is φ = 1075152.

The previous prime is 2687879. The next prime is 2687891. The reversal of 2687890 is 987862.

It can be written as a sum of positive squares in 2 ways, for example, as 2199289 + 488601 = 1483^2 + 699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2687891) 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, 134385 + ... + 134404.

2^2687890 is an apocalyptic number.

2687890 is a deficient number, since it is larger than the sum of its proper divisors (2150330).

2687890 is a wasteful number, since it uses less digits than its factorization.

2687890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268796.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 2687890 is about 1639.4785756453. The cubic root of 2687890 is about 139.0391691281.

The spelling of 2687890 in words is "two million, six hundred eighty-seven thousand, eight hundred ninety".