1216950140 has 48 divisors (see below), whose sum is σ = 2922995712. Its totient is φ = 416909376.

The previous prime is 1216950139. The next prime is 1216950169. The reversal of 1216950140 is 410596121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230207 + ... + 235433.

It is an arithmetic number, because the mean of its divisors is an integer number (60895744).

Almost surely, 2^1216950140 is an apocalyptic number.

1216950140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216950140 is an abundant number, since it is smaller than the sum of its proper divisors (1706045572).

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

1216950140 is a wasteful number, since it uses less digits than its factorization.

1216950140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1216950140 is about 34884.8124547058. The cubic root of 1216950140 is about 1067.6385865812.

The spelling of 1216950140 in words is "one billion, two hundred sixteen million, nine hundred fifty thousand, one hundred forty".