1890331734690 has 128 divisors (see below), whose sum is σ = 5761767997440. Its totient is φ = 432019051200.

The previous prime is 1890331734677. The next prime is 1890331734701. The reversal of 1890331734690 is 964371330981.

It is a happy number.

1890331734690 is a `hidden beast` number, since 1 + 8 + 9 + 0 + 3 + 3 + 173 + 469 + 0 = 666.

It is a super-2 number, since 2×1890331734690² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15268135 + ... + 15391445.

It is an arithmetic number, because the mean of its divisors is an integer number (45013812480).

Almost surely, 2^{1890331734690} is an apocalyptic number.

1890331734690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890331734690 is an abundant number, since it is smaller than the sum of its proper divisors (3871436262750).

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

1890331734690 is a wasteful number, since it uses less digits than its factorization.

1890331734690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131445 (or 131439 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 1890331734690 in words is "one trillion, eight hundred ninety billion, three hundred thirty-one million, seven hundred thirty-four thousand, six hundred ninety".