3945919190 has 8 divisors (see below), whose sum is σ = 7102654560. Its totient is φ = 1578367672.

The previous prime is 3945919189. The next prime is 3945919213. The reversal of 3945919190 is 919195493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3945919190² = 31140556508020512200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197295950 + ... + 197295969.

It is an arithmetic number, because the mean of its divisors is an integer number (887831820).

Almost surely, 2^3945919190 is an apocalyptic number.

3945919190 is a deficient number, since it is larger than the sum of its proper divisors (3156735370).

3945919190 is a wasteful number, since it uses less digits than its factorization.

3945919190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394591926.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 3945919190 is about 62816.5518792619. The cubic root of 3945919190 is about 1580.2145718842.

The spelling of 3945919190 in words is "three billion, nine hundred forty-five million, nine hundred nineteen thousand, one hundred ninety".