1890495945 has 96 divisors (see below), whose sum is σ = 3652975872. Its totient is φ = 898407936.

The previous prime is 1890495941. The next prime is 1890496001. The reversal of 1890495945 is 5495940981.

1890495945 is a `hidden beast` number, since 1 + 8 + 9 + 0 + 49 + 594 + 5 = 666.

It is not a de Polignac number, because 1890495945 - 2² = 1890495941 is a prime.

It is a super-2 number, since 2×1890495945² = 7147949836122886050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1890495891 and 1890495900.

It is not an unprimeable number, because it can be changed into a prime (1890495941) 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 95 ways as a sum of consecutive naturals, for example, 3614454 + ... + 3614976.

It is an arithmetic number, because the mean of its divisors is an integer number (38051832).

Almost surely, 2^1890495945 is an apocalyptic number.

1890495945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1890495945 is a deficient number, since it is larger than the sum of its proper divisors (1762479927).

1890495945 is a wasteful number, since it uses less digits than its factorization.

1890495945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The square root of 1890495945 is about 43479.8337738313. The cubic root of 1890495945 is about 1236.4937249735.

The spelling of 1890495945 in words is "one billion, eight hundred ninety million, four hundred ninety-five thousand, nine hundred forty-five".