2188506140 has 12 divisors (see below), whose sum is σ = 4595862936. Its totient is φ = 875402448.

The previous prime is 2188506139. The next prime is 2188506161. The reversal of 2188506140 is 416058812.

It is a self number, because there is not a number n which added to its sum of digits gives 2188506140.

It is a congruent number.

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, 54712634 + ... + 54712673.

It is an arithmetic number, because the mean of its divisors is an integer number (382988578).

Almost surely, 2^2188506140 is an apocalyptic number.

2188506140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188506140 is an abundant number, since it is smaller than the sum of its proper divisors (2407356796).

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

2188506140 is a wasteful number, since it uses less digits than its factorization.

2188506140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109425316 (or 109425314 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 2188506140 is about 46781.4721871811. The cubic root of 2188506140 is about 1298.3225188051.

The spelling of 2188506140 in words is "two billion, one hundred eighty-eight million, five hundred six thousand, one hundred forty".