1898152668 has 72 divisors (see below), whose sum is σ = 5090641920. Its totient is φ = 594669600.

The previous prime is 1898152637. The next prime is 1898152681. The reversal of 1898152668 is 8662518981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75943 + ... + 97793.

It is an arithmetic number, because the mean of its divisors is an integer number (70703360).

Almost surely, 2^1898152668 is an apocalyptic number.

1898152668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1898152668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2545320960).

1898152668 is an abundant number, since it is smaller than the sum of its proper divisors (3192489252).

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

1898152668 is a wasteful number, since it uses less digits than its factorization.

1898152668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22007 (or 22002 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 1898152668 is about 43567.7939308384. The cubic root of 1898152668 is about 1238.1607896717.

The spelling of 1898152668 in words is "one billion, eight hundred ninety-eight million, one hundred fifty-two thousand, six hundred sixty-eight".