2194455690 has 192 divisors, whose sum is σ = 6759417600. Its totient is φ = 493637760.

The previous prime is 2194455677. The next prime is 2194455721. The reversal of 2194455690 is 965544912.

2194455690 is a `hidden beast` number, since 2 + 1 + 9 + 4 + 4 + 556 + 90 = 666.

It is a super-2 number, since 2×2194455690² = 9631271550746752200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2067760 + ... + 2068820.

It is an arithmetic number, because the mean of its divisors is an integer number (35205300).

Almost surely, 2^2194455690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2194455690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3379708800).

2194455690 is an abundant number, since it is smaller than the sum of its proper divisors (4564961910).

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

2194455690 is a wasteful number, since it uses less digits than its factorization.

2194455690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 2194455690 is about 46845.0177713703. The cubic root of 2194455690 is about 1299.4979698605.

The spelling of 2194455690 in words is "two billion, one hundred ninety-four million, four hundred fifty-five thousand, six hundred ninety".