1840197898 has 16 divisors (see below), whose sum is σ = 3441409344. Its totient is φ = 716960160.

The previous prime is 1840197893. The next prime is 1840197911. The reversal of 1840197898 is 8987910481.

It is not an unprimeable number, because it can be changed into a prime (1840197893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5974515 + ... + 5974822.

It is an arithmetic number, because the mean of its divisors is an integer number (215088084).

Almost surely, 2^1840197898 is an apocalyptic number.

1840197898 is a deficient number, since it is larger than the sum of its proper divisors (1601211446).

1840197898 is a wasteful number, since it uses less digits than its factorization.

1840197898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949357.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The square root of 1840197898 is about 42897.5278774896. The cubic root of 1840197898 is about 1225.4290648598.

The spelling of 1840197898 in words is "one billion, eight hundred forty million, one hundred ninety-seven thousand, eight hundred ninety-eight".