1890788340 has 96 divisors (see below), whose sum is σ = 6153154560. Its totient is φ = 424849536.

The previous prime is 1890788329. The next prime is 1890788353. The reversal of 1890788340 is 438870981.

1890788340 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1890788340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13372 + ... + 62931.

It is an arithmetic number, because the mean of its divisors is an integer number (64095360).

Almost surely, 2^1890788340 is an apocalyptic number.

1890788340 is a gapful number since it is divisible by the number (10) 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 1890788340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3076577280).

1890788340 is an abundant number, since it is smaller than the sum of its proper divisors (4262366220).

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

1890788340 is a wasteful number, since it uses less digits than its factorization.

1890788340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76381 (or 76379 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1890788340 is about 43483.1960646869. The cubic root of 1890788340 is about 1236.5574694362.

The spelling of 1890788340 in words is "one billion, eight hundred ninety million, seven hundred eighty-eight thousand, three hundred forty".