2207988 has 18 divisors (see below), whose sum is σ = 5581394. Its totient is φ = 735984.

The previous prime is 2207987. The next prime is 2207993. The reversal of 2207988 is 8897022.

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 11664 = 1482^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2207988² = 9750422016288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 61333 = 2207988 / (2 + 2 + 0 + 7 + 9 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2207981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30631 + ... + 30702.

2^2207988 is an apocalyptic number.

It is an amenable number.

2207988 is an abundant number, since it is smaller than the sum of its proper divisors (3373406).

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

2207988 is a wasteful number, since it uses less digits than its factorization.

2207988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61343 (or 61338 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2207988 is about 1485.9300118108. The cubic root of 2207988 is about 130.2163655305.

The spelling of 2207988 in words is "two million, two hundred seven thousand, nine hundred eighty-eight".