1231646416 has 120 divisors (see below), whose sum is σ = 3228737792. Its totient is φ = 442886400.

The previous prime is 1231646407. The next prime is 1231646431. The reversal of 1231646416 is 6146461321.

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, 172681 + ... + 179671.

Almost surely, 2^1231646416 is an apocalyptic number.

1231646416 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 1231646416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614368896).

1231646416 is an abundant number, since it is smaller than the sum of its proper divisors (1997091376).

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

1231646416 is a wasteful number, since it uses less digits than its factorization.

1231646416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041 (or 7024 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 1231646416 is about 35094.8203585657. The cubic root of 1231646416 is about 1071.9191156393.

The spelling of 1231646416 in words is "one billion, two hundred thirty-one million, six hundred forty-six thousand, four hundred sixteen".