1086631998 has 16 divisors (see below), whose sum is σ = 2176816656. Its totient is φ = 361618560.

The previous prime is 1086631981. The next prime is 1086632039. The reversal of 1086631998 is 8991366801.

It is a self number, because there is not a number n which added to its sum of digits gives 1086631998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144043 + ... + 151398.

It is an arithmetic number, because the mean of its divisors is an integer number (136051041).

Almost surely, 2^1086631998 is an apocalyptic number.

1086631998 is an abundant number, since it is smaller than the sum of its proper divisors (1090184658).

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

1086631998 is a wasteful number, since it uses less digits than its factorization.

1086631998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296059.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1086631998 is about 32964.1016561956. The cubic root of 1086631998 is about 1028.0813870420.

The spelling of 1086631998 in words is "one billion, eighty-six million, six hundred thirty-one thousand, nine hundred ninety-eight".