1216466460 has 72 divisors (see below), whose sum is σ = 4025404656. Its totient is φ = 294900480.

The previous prime is 1216466437. The next prime is 1216466473. The reversal of 1216466460 is 646646121.

1216466460 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 4 + 6 + 646 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305209 + ... + 309168.

It is an arithmetic number, because the mean of its divisors is an integer number (55908398).

Almost surely, 2^1216466460 is an apocalyptic number.

1216466460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216466460 is an abundant number, since it is smaller than the sum of its proper divisors (2808938196).

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

1216466460 is a wasteful number, since it uses less digits than its factorization.

1216466460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614403 (or 614398 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1216466460 is about 34877.8792359857. The cubic root of 1216466460 is about 1067.4971225930.

The spelling of 1216466460 in words is "one billion, two hundred sixteen million, four hundred sixty-six thousand, four hundred sixty".