2661988 has 12 divisors (see below), whose sum is σ = 5324032. Its totient is φ = 1140840.

The previous prime is 2661961. The next prime is 2661991. The reversal of 2661988 is 8891662.

2661988 is an admirable number.

It is a super-2 number, since 2×2661988² = 14172360224288, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661988.

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, 47508 + ... + 47563.

2^2661988 is an apocalyptic number.

2661988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2661988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2661988 is a wasteful number, since it uses less digits than its factorization.

2661988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95082 (or 95080 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 2661988 is about 1631.5599897031. The cubic root of 2661988 is about 138.5911072367.

The spelling of 2661988 in words is "two million, six hundred sixty-one thousand, nine hundred eighty-eight".