2086398690 has 32 divisors (see below), whose sum is σ = 5070746880. Its totient is φ = 549329664.

The previous prime is 2086398679. The next prime is 2086398751. The reversal of 2086398690 is 968936802.

It is a super-2 number, since 2×2086398690² = 8706118987267432200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437799 + ... + 442538.

It is an arithmetic number, because the mean of its divisors is an integer number (158460840).

Almost surely, 2^2086398690 is an apocalyptic number.

2086398690 is an abundant number, since it is smaller than the sum of its proper divisors (2984348190).

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

2086398690 is a wasteful number, since it uses less digits than its factorization.

2086398690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880426.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 2086398690 is about 45677.1134158016. The cubic root of 2086398690 is about 1277.8084834769.

The spelling of 2086398690 in words is "two billion, eighty-six million, three hundred ninety-eight thousand, six hundred ninety".