1243867016 has 64 divisors (see below), whose sum is σ = 2848348800. Its totient is φ = 497083392.

The previous prime is 1243867007. The next prime is 1243867019. The reversal of 1243867016 is 6107683421.

It is not an unprimeable number, because it can be changed into a prime (1243867019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97775 + ... + 109761.

It is an arithmetic number, because the mean of its divisors is an integer number (44505450).

Almost surely, 2^1243867016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243867016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424174400).

1243867016 is an abundant number, since it is smaller than the sum of its proper divisors (1604481784).

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

1243867016 is a wasteful number, since it uses less digits than its factorization.

1243867016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12126 (or 12122 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1243867016 is about 35268.4989190070. The cubic root of 1243867016 is about 1075.4527073987.

The spelling of 1243867016 in words is "one billion, two hundred forty-three million, eight hundred sixty-seven thousand, sixteen".