1216982270 has 32 divisors (see below), whose sum is σ = 2537811648. Its totient is φ = 411533568.

The previous prime is 1216982231. The next prime is 1216982293. The reversal of 1216982270 is 722896121.

It is a Curzon number.

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, 113969 + ... + 124188.

It is an arithmetic number, because the mean of its divisors is an integer number (79306614).

Almost surely, 2^1216982270 is an apocalyptic number.

1216982270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216982270 is an abundant number, since it is smaller than the sum of its proper divisors (1320829378).

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

1216982270 is a wasteful number, since it uses less digits than its factorization.

1216982270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238244.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1216982270 is about 34885.2729672565. The cubic root of 1216982270 is about 1067.6479824539.

The spelling of 1216982270 in words is "one billion, two hundred sixteen million, nine hundred eighty-two thousand, two hundred seventy".