1121678180 has 48 divisors (see below), whose sum is σ = 2694456576. Its totient is φ = 384228480.

The previous prime is 1121678039. The next prime is 1121678183. The reversal of 1121678180 is 818761211.

It is a super-2 number, since 2×1121678180² = 2516323878976224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1121678180.

It is not an unprimeable number, because it can be changed into a prime (1121678183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188450 + ... + 194310.

It is an arithmetic number, because the mean of its divisors is an integer number (56134512).

Almost surely, 2^1121678180 is an apocalyptic number.

1121678180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121678180 is an abundant number, since it is smaller than the sum of its proper divisors (1572778396).

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

1121678180 is a wasteful number, since it uses less digits than its factorization.

1121678180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244 (or 7242 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 35.

The square root of 1121678180 is about 33491.4642856952. The cubic root of 1121678180 is about 1039.0172484132.

The spelling of 1121678180 in words is "one billion, one hundred twenty-one million, six hundred seventy-eight thousand, one hundred eighty".