1890201894 has 32 divisors (see below), whose sum is σ = 4334121216. Its totient is φ = 538350240.

The previous prime is 1890201889. The next prime is 1890201917. The reversal of 1890201894 is 4981020981.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 57672 + ... + 84299.

It is an arithmetic number, because the mean of its divisors is an integer number (135441288).

Almost surely, 2^1890201894 is an apocalyptic number.

1890201894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1890201894 is an abundant number, since it is smaller than the sum of its proper divisors (2443919322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1890201894 is a wasteful number, since it uses less digits than its factorization.

1890201894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142300.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1890201894 is about 43476.4521781619. The cubic root of 1890201894 is about 1236.4296128605.

The spelling of 1890201894 in words is "one billion, eight hundred ninety million, two hundred one thousand, eight hundred ninety-four".