1216914270 has 128 divisors (see below), whose sum is σ = 3444456960. Its totient is φ = 271265280.

The previous prime is 1216914241. The next prime is 1216914301. The reversal of 1216914270 is 724196121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1797172 + ... + 1797848.

It is an arithmetic number, because the mean of its divisors is an integer number (26909820).

Almost surely, 2^1216914270 is an apocalyptic number.

1216914270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216914270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722228480).

1216914270 is an abundant number, since it is smaller than the sum of its proper divisors (2227542690).

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

1216914270 is a wasteful number, since it uses less digits than its factorization.

1216914270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1216914270 is about 34884.2983303377. The cubic root of 1216914270 is about 1067.6280968136.

The spelling of 1216914270 in words is "one billion, two hundred sixteen million, nine hundred fourteen thousand, two hundred seventy".