1890498681 has 12 divisors (see below), whose sum is σ = 2738594352. Its totient is φ = 1256698296.

The previous prime is 1890498679. The next prime is 1890498691. The reversal of 1890498681 is 1868940981.

1890498681 is a `hidden beast` number, since 1 + 8 + 90 + 498 + 68 + 1 = 666.

It is not a de Polignac number, because 1890498681 - 2¹ = 1890498679 is a prime.

It is a super-2 number, since 2×1890498681² = 7147970525725479522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1890498671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299551 + ... + 305796.

It is an arithmetic number, because the mean of its divisors is an integer number (228216196).

Almost surely, 2^1890498681 is an apocalyptic number.

It is an amenable number.

1890498681 is a deficient number, since it is larger than the sum of its proper divisors (848095671).

1890498681 is a wasteful number, since it uses less digits than its factorization.

1890498681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605700 (or 605697 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1890498681 is about 43479.8652366817. The cubic root of 1890498681 is about 1236.4943214740.

The spelling of 1890498681 in words is "one billion, eight hundred ninety million, four hundred ninety-eight thousand, six hundred eighty-one".