1100991672 has 96 divisors (see below), whose sum is σ = 3444320880. Its totient is φ = 314004480.

The previous prime is 1100991667. The next prime is 1100991673. The reversal of 1100991672 is 2761990011.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100991673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27423 + ... + 54350.

Almost surely, 2^1100991672 is an apocalyptic number.

1100991672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1100991672 is an abundant number, since it is smaller than the sum of its proper divisors (2343329208).

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

1100991672 is a wasteful number, since it uses less digits than its factorization.

1100991672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81813 (or 81806 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 1100991672 is about 33181.1945535419. The cubic root of 1100991672 is about 1032.5902293403.

The spelling of 1100991672 in words is "one billion, one hundred million, nine hundred ninety-one thousand, six hundred seventy-two".