1099999960 has 32 divisors (see below), whose sum is σ = 2620589760. Its totient is φ = 414117376.

The previous prime is 1099999907. The next prime is 1099999961. The reversal of 1099999960 is 699999901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099999961) 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, 808144 + ... + 809503.

It is an arithmetic number, because the mean of its divisors is an integer number (81893430).

Almost surely, 2^1099999960 is an apocalyptic number.

1099999960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099999960 is an abundant number, since it is smaller than the sum of its proper divisors (1520589800).

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

1099999960 is a wasteful number, since it uses less digits than its factorization.

1099999960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617675 (or 1617671 counting only the distinct ones).

The product of its (nonzero) digits is 3188646, while the sum is 61.

The square root of 1099999960 is about 33166.2473005313. The cubic root of 1099999960 is about 1032.2801029439.

The spelling of 1099999960 in words is "one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty".