1890471145 has 32 divisors (see below), whose sum is σ = 2448748800. Its totient is φ = 1395947520.

The previous prime is 1890471071. The next prime is 1890471157. The reversal of 1890471145 is 5411740981.

It is not a de Polignac number, because 1890471145 - 2⁷ = 1890471017 is a prime.

It is a super-2 number, since 2×1890471145² = 7147762300155222050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1890471098 and 1890471107.

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, 1234030 + ... + 1235560.

It is an arithmetic number, because the mean of its divisors is an integer number (76523400).

Almost surely, 2^1890471145 is an apocalyptic number.

It is an amenable number.

1890471145 is a deficient number, since it is larger than the sum of its proper divisors (558277655).

1890471145 is a wasteful number, since it uses less digits than its factorization.

1890471145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 1890471145 is about 43479.5485832132. The cubic root of 1890471145 is about 1236.4883180716.

The spelling of 1890471145 in words is "one billion, eight hundred ninety million, four hundred seventy-one thousand, one hundred forty-five".