1890161432 has 16 divisors (see below), whose sum is σ = 3593970000. Its totient is φ = 931769440.

The previous prime is 1890161431. The next prime is 1890161437. The reversal of 1890161432 is 2341610981.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1890161392 and 1890161401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890161431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663307 + ... + 1664442.

It is an arithmetic number, because the mean of its divisors is an integer number (224623125).

Almost surely, 2^1890161432 is an apocalyptic number.

It is an amenable number.

1890161432 is a deficient number, since it is larger than the sum of its proper divisors (1703808568).

1890161432 is a wasteful number, since it uses less digits than its factorization.

1890161432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327826 (or 3327822 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1890161432 is about 43475.9868433139. The cubic root of 1890161432 is about 1236.4207903863.

The spelling of 1890161432 in words is "one billion, eight hundred ninety million, one hundred sixty-one thousand, four hundred thirty-two".