2638986 has 32 divisors (see below), whose sum is σ = 6351360. Its totient is φ = 714096.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2638986 is 6898362.

2638986 = 29² + 30² + ... + 199².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 856 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (198480).

2^2638986 is an apocalyptic number.

2638986 is an abundant number, since it is smaller than the sum of its proper divisors (3712374).

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

2638986 is a wasteful number, since it uses less digits than its factorization.

2638986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338.

The product of its digits is 124416, while the sum is 42.

The square root of 2638986 is about 1624.4956140292. The cubic root of 2638986 is about 138.1907674627.

The spelling of 2638986 in words is "two million, six hundred thirty-eight thousand, nine hundred eighty-six".