1243244416 has 32 divisors (see below), whose sum is σ = 2517394680. Its totient is φ = 611427840.

The previous prime is 1243244411. The next prime is 1243244417. The reversal of 1243244416 is 6144423421.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243244411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71806 + ... + 87421.

Almost surely, 2^1243244416 is an apocalyptic number.

1243244416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1243244416 is an abundant number, since it is smaller than the sum of its proper divisors (1274150264).

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

1243244416 is an equidigital number, since it uses as much as digits as its factorization.

1243244416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159302 (or 159290 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 1243244416 is about 35259.6712406681. The cubic root of 1243244416 is about 1075.2732432508.

Adding to 1243244416 its reverse (6144423421), we get a palindrome (7387667837).

The spelling of 1243244416 in words is "one billion, two hundred forty-three million, two hundred forty-four thousand, four hundred sixteen".