1898941618 has 8 divisors (see below), whose sum is σ = 3255328512. Its totient is φ = 813832116.

The previous prime is 1898941613. The next prime is 1898941697. The reversal of 1898941618 is 8161498981.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1898941613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67819330 + ... + 67819357.

It is an arithmetic number, because the mean of its divisors is an integer number (406916064).

Almost surely, 2^1898941618 is an apocalyptic number.

1898941618 is a deficient number, since it is larger than the sum of its proper divisors (1356386894).

1898941618 is a wasteful number, since it uses less digits than its factorization.

1898941618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135638696.

The product of its digits is 995328, while the sum is 55.

The square root of 1898941618 is about 43576.8472700814. The cubic root of 1898941618 is about 1238.3323093574.

The spelling of 1898941618 in words is "one billion, eight hundred ninety-eight million, nine hundred forty-one thousand, six hundred eighteen".