1998290886 has 16 divisors (see below), whose sum is σ = 3997076544. Its totient is φ = 666014504.

The previous prime is 1998290881. The next prime is 1998290893. The reversal of 1998290886 is 6880928991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998290881) 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, 51061 + ... + 81263.

It is an arithmetic number, because the mean of its divisors is an integer number (249817284).

Almost surely, 2^1998290886 is an apocalyptic number.

1998290886 is an abundant number, since it is smaller than the sum of its proper divisors (1998785658).

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

1998290886 is a wasteful number, since it uses less digits than its factorization.

1998290886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41235.

The product of its (nonzero) digits is 4478976, while the sum is 60.

The square root of 1998290886 is about 44702.2469905037. The cubic root of 1998290886 is about 1259.5620561644.

The spelling of 1998290886 in words is "one billion, nine hundred ninety-eight million, two hundred ninety thousand, eight hundred eighty-six".