1216962240 has 224 divisors, whose sum is σ = 4192950720. Its totient is φ = 299040768.

The previous prime is 1216962239. The next prime is 1216962247. The reversal of 1216962240 is 422696121.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1216962247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2108832 + ... + 2109408.

It is an arithmetic number, because the mean of its divisors is an integer number (18718530).

Almost surely, 2^1216962240 is an apocalyptic number.

1216962240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216962240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096475360).

1216962240 is an abundant number, since it is smaller than the sum of its proper divisors (2975988480).

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

1216962240 is an equidigital number, since it uses as much as digits as its factorization.

1216962240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1216962240 is about 34884.9858821815. The cubic root of 1216962240 is about 1067.6421250401.

The spelling of 1216962240 in words is "one billion, two hundred sixteen million, nine hundred sixty-two thousand, two hundred forty".