1890091006 has 8 divisors (see below), whose sum is σ = 2984354280. Its totient is φ = 895306248.

The previous prime is 1890090977. The next prime is 1890091057. The reversal of 1890091006 is 6001900981.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 24869581 + ... + 24869656.

It is an arithmetic number, because the mean of its divisors is an integer number (373044285).

Almost surely, 2^1890091006 is an apocalyptic number.

1890091006 is a deficient number, since it is larger than the sum of its proper divisors (1094263274).

1890091006 is a wasteful number, since it uses less digits than its factorization.

1890091006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49739258.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1890091006 is about 43475.1768944072. The cubic root of 1890091006 is about 1236.4054341579.

Adding to 1890091006 its reverse (6001900981), we get a palindrome (7891991987).

The spelling of 1890091006 in words is "one billion, eight hundred ninety million, ninety-one thousand, six".