990106786 has 16 divisors (see below), whose sum is σ = 1542820608. Its totient is φ = 476173600.

The previous prime is 990106769. The next prime is 990106787. The reversal of 990106786 is 687601099.

It is a super-2 number, since 2×990106786² = 1960622895366499592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990106787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79210 + ... + 90853.

It is an arithmetic number, because the mean of its divisors is an integer number (96426288).

Almost surely, 2^990106786 is an apocalyptic number.

990106786 is a deficient number, since it is larger than the sum of its proper divisors (552713822).

990106786 is a wasteful number, since it uses less digits than its factorization.

990106786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170177.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 990106786 is about 31465.9623402813. The cubic root of 990106786 is about 996.6913267551.

The spelling of 990106786 in words is "nine hundred ninety million, one hundred six thousand, seven hundred eighty-six".