2190023640 has 576 divisors, whose sum is σ = 8979141600. Its totient is φ = 459841536.

The previous prime is 2190023639. The next prime is 2190023699. The reversal of 2190023640 is 463200912.

2190023640 is a `hidden beast` number, since 2 + 19 + 0 + 0 + 2 + 3 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 20091906 + ... + 20092014.

Almost surely, 2^2190023640 is an apocalyptic number.

2190023640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2190023640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4489570800).

2190023640 is an abundant number, since it is smaller than the sum of its proper divisors (6789117960).

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

2190023640 is a wasteful number, since it uses less digits than its factorization.

2190023640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2190023640 is about 46797.6884044501. The cubic root of 2190023640 is about 1298.6225330759.

The spelling of 2190023640 in words is "two billion, one hundred ninety million, twenty-three thousand, six hundred forty".