1101986172 has 144 divisors (see below), whose sum is σ = 3419200512. Its totient is φ = 292078080.

The previous prime is 1101986147. The next prime is 1101986183. The reversal of 1101986172 is 2716891011.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 302353 + ... + 305975.

It is an arithmetic number, because the mean of its divisors is an integer number (23744448).

Almost surely, 2^1101986172 is an apocalyptic number.

1101986172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101986172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709600256).

1101986172 is an abundant number, since it is smaller than the sum of its proper divisors (2317214340).

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

1101986172 is a wasteful number, since it uses less digits than its factorization.

1101986172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

The square root of 1101986172 is about 33196.1770690542. The cubic root of 1101986172 is about 1032.9010406357.

The spelling of 1101986172 in words is "one billion, one hundred one million, nine hundred eighty-six thousand, one hundred seventy-two".