1899841398 has 32 divisors (see below), whose sum is σ = 4676534016. Its totient is φ = 501056928.

The previous prime is 1899841397. The next prime is 1899841399. The reversal of 1899841398 is 8931489981.

It is an interprime number because it is at equal distance from previous prime (1899841397) and next prime (1899841399).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1899841397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1739236 + ... + 1740327.

It is an arithmetic number, because the mean of its divisors is an integer number (146141688).

Almost surely, 2^1899841398 is an apocalyptic number.

1899841398 is an abundant number, since it is smaller than the sum of its proper divisors (2776692618).

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

1899841398 is a wasteful number, since it uses less digits than its factorization.

1899841398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479588.

The product of its digits is 4478976, while the sum is 60.

The square root of 1899841398 is about 43587.1701077278. The cubic root of 1899841398 is about 1238.5278657830.

The spelling of 1899841398 in words is "one billion, eight hundred ninety-nine million, eight hundred forty-one thousand, three hundred ninety-eight".