1890367668 has 144 divisors (see below), whose sum is σ = 5765760000. Its totient is φ = 521381952.

The previous prime is 1890367667. The next prime is 1890367669. The reversal of 1890367668 is 8667630981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1890367667) and next prime (1890367669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890367667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 355453 + ... + 360731.

It is an arithmetic number, because the mean of its divisors is an integer number (40040000).

Almost surely, 2^1890367668 is an apocalyptic number.

1890367668 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 1890367668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2882880000).

1890367668 is an abundant number, since it is smaller than the sum of its proper divisors (3875392332).

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

1890367668 is a wasteful number, since it uses less digits than its factorization.

1890367668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339 (or 5320 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 1890367668 is about 43478.3586166727. The cubic root of 1890367668 is about 1236.4657574811.

The spelling of 1890367668 in words is "one billion, eight hundred ninety million, three hundred sixty-seven thousand, six hundred sixty-eight".