1212180440 has 16 divisors (see below), whose sum is σ = 2727406080. Its totient is φ = 484872160.

The previous prime is 1212180397. The next prime is 1212180479. The reversal of 1212180440 is 440812121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15152216 + ... + 15152295.

It is an arithmetic number, because the mean of its divisors is an integer number (170462880).

Almost surely, 2^1212180440 is an apocalyptic number.

1212180440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212180440 is an abundant number, since it is smaller than the sum of its proper divisors (1515225640).

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

1212180440 is a wasteful number, since it uses less digits than its factorization.

1212180440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30304522 (or 30304518 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1212180440 is about 34816.3817763995. The cubic root of 1212180440 is about 1066.2419302889.

Adding to 1212180440 its reverse (440812121), we get a palindrome (1652992561).

The spelling of 1212180440 in words is "one billion, two hundred twelve million, one hundred eighty thousand, four hundred forty".