1213462656 has 384 divisors, whose sum is σ = 4232592000. Its totient is φ = 333268992.

The previous prime is 1213462643. The next prime is 1213462687. The reversal of 1213462656 is 6562643121.

1213462656 is a `hidden beast` number, since 1 + 21 + 3 + 4 + 626 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1213462656.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14619991 + ... + 14620073.

It is an arithmetic number, because the mean of its divisors is an integer number (11022375).

Almost surely, 2^1213462656 is an apocalyptic number.

1213462656 is a gapful number since it is divisible by the number (16) 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 1213462656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116296000).

1213462656 is an abundant number, since it is smaller than the sum of its proper divisors (3019129344).

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

1213462656 is an equidigital number, since it uses as much as digits as its factorization.

1213462656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 132 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1213462656 is about 34834.7908849759. The cubic root of 1213462656 is about 1066.6177463675.

The spelling of 1213462656 in words is "one billion, two hundred thirteen million, four hundred sixty-two thousand, six hundred fifty-six".