1099955808 has 96 divisors (see below), whose sum is σ = 3666539520. Its totient is φ = 314271360.

The previous prime is 1099955797. The next prime is 1099955837. The reversal of 1099955808 is 8085599901.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84888 + ... + 96983.

It is an arithmetic number, because the mean of its divisors is an integer number (38193120).

Almost surely, 2^1099955808 is an apocalyptic number.

1099955808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1099955808 is an abundant number, since it is smaller than the sum of its proper divisors (2566583712).

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

1099955808 is a wasteful number, since it uses less digits than its factorization.

1099955808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181897 (or 181883 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The square root of 1099955808 is about 33165.5816773956. The cubic root of 1099955808 is about 1032.2662914764.

The spelling of 1099955808 in words is "one billion, ninety-nine million, nine hundred fifty-five thousand, eight hundred eight".