2190685240 has 16 divisors (see below), whose sum is σ = 4929041880. Its totient is φ = 876274080.

The previous prime is 2190685193. The next prime is 2190685241. The reversal of 2190685240 is 425860912.

It is a self number, because there is not a number n which added to its sum of digits gives 2190685240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190685241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27383526 + ... + 27383605.

Almost surely, 2^2190685240 is an apocalyptic number.

2190685240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190685240 is an abundant number, since it is smaller than the sum of its proper divisors (2738356640).

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

2190685240 is a wasteful number, since it uses less digits than its factorization.

2190685240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54767142 (or 54767138 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2190685240 is about 46804.7565958846. The cubic root of 2190685240 is about 1298.7532899848.

The spelling of 2190685240 in words is "two billion, one hundred ninety million, six hundred eighty-five thousand, two hundred forty".