2215908 has 18 divisors (see below), whose sum is σ = 5601414. Its totient is φ = 738624.

The previous prime is 2215903. The next prime is 2215921. The reversal of 2215908 is 8095122.

It can be written as a sum of positive squares in only one way, i.e., 2214144 + 1764 = 1488^2 + 42^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2215901) 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, 30741 + ... + 30812.

2^2215908 is an apocalyptic number.

It is an amenable number.

2215908 is an abundant number, since it is smaller than the sum of its proper divisors (3385506).

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

2215908 is a wasteful number, since it uses less digits than its factorization.

2215908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61563 (or 61558 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2215908 is about 1488.5926239237. The cubic root of 2215908 is about 130.3718740700.

The spelling of 2215908 in words is "two million, two hundred fifteen thousand, nine hundred eight".