1102091920 has 40 divisors (see below), whose sum is σ = 2673775296. Its totient is φ = 421669248.

The previous prime is 1102091909. The next prime is 1102091927. The reversal of 1102091920 is 291902011.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1102091927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297642 + ... + 301321.

Almost surely, 2^1102091920 is an apocalyptic number.

1102091920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1102091920 is an abundant number, since it is smaller than the sum of its proper divisors (1571683376).

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

1102091920 is a wasteful number, since it uses less digits than its factorization.

1102091920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598999 (or 598993 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1102091920 is about 33197.7698046119. The cubic root of 1102091920 is about 1032.9340790797.

Adding to 1102091920 its reverse (291902011), we get a palindrome (1393993931).

It can be divided in two parts, 1102091 and 920, that added together give a palindrome (1103011).

The spelling of 1102091920 in words is "one billion, one hundred two million, ninety-one thousand, nine hundred twenty".