1890242007956 has 12 divisors (see below), whose sum is σ = 3308472224820. Its totient is φ = 944964229440.

The previous prime is 1890242007947. The next prime is 1890242007971. The reversal of 1890242007956 is 6597002420981.

It can be written as a sum of positive squares in 2 ways, for example, as 885368083600 + 1004873924356 = 940940^2 + 1002434^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1890242007898 and 1890242007907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39166505 + ... + 39214736.

It is an arithmetic number, because the mean of its divisors is an integer number (275706018735).

Almost surely, 2^{1890242007956} is an apocalyptic number.

It is an amenable number.

1890242007956 is a deficient number, since it is larger than the sum of its proper divisors (1418230216864).

1890242007956 is a wasteful number, since it uses less digits than its factorization.

1890242007956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78387274 (or 78387272 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 1890242007956 in words is "one trillion, eight hundred ninety billion, two hundred forty-two million, seven thousand, nine hundred fifty-six".