1908191814 has 16 divisors (see below), whose sum is σ = 3817110528. Its totient is φ = 635942792.

The previous prime is 1908191801. The next prime is 1908191827. The reversal of 1908191814 is 4181918091.

It is a happy number.

1908191814 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1908191801) and next prime (1908191827).

It is a super-2 number, since 2×1908191814² = 7282391998033221192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7459 + ... + 62225.

It is an arithmetic number, because the mean of its divisors is an integer number (238569408).

Almost surely, 2^1908191814 is an apocalyptic number.

1908191814 is an abundant number, since it is smaller than the sum of its proper divisors (1908918714).

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

1908191814 is a wasteful number, since it uses less digits than its factorization.

1908191814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60579.

The product of its (nonzero) digits is 20736, while the sum is 42.

The square root of 1908191814 is about 43682.8549204376. The cubic root of 1908191814 is about 1240.3397902487.

The spelling of 1908191814 in words is "one billion, nine hundred eight million, one hundred ninety-one thousand, eight hundred fourteen".