1890997086 has 32 divisors (see below), whose sum is σ = 4258907136. Its totient is φ = 554544000.

The previous prime is 1890997061. The next prime is 1890997109. The reversal of 1890997086 is 6807990981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460075 + ... + 464166.

It is an arithmetic number, because the mean of its divisors is an integer number (133090848).

Almost surely, 2^1890997086 is an apocalyptic number.

1890997086 is an abundant number, since it is smaller than the sum of its proper divisors (2367910050).

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

1890997086 is a wasteful number, since it uses less digits than its factorization.

1890997086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924288.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 1890997086 is about 43485.5963049836. The cubic root of 1890997086 is about 1236.6029737234.

The spelling of 1890997086 in words is "one billion, eight hundred ninety million, nine hundred ninety-seven thousand, eighty-six".