1243739448 has 240 divisors, whose sum is σ = 4248929520. Its totient is φ = 331817472.

The previous prime is 1243739381. The next prime is 1243739459. The reversal of 1243739448 is 8449373421.

It is a super-2 number, since 2×1243739448² = 3093775629022689408, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9793161 + ... + 9793287.

It is an arithmetic number, because the mean of its divisors is an integer number (17703873).

Almost surely, 2^1243739448 is an apocalyptic number.

1243739448 is a gapful number since it is divisible by the number (18) 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 1243739448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124464760).

1243739448 is an abundant number, since it is smaller than the sum of its proper divisors (3005190072).

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

1243739448 is a wasteful number, since it uses less digits than its factorization.

1243739448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 156 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 1243739448 is about 35266.6903465579. The cubic root of 1243739448 is about 1075.4159408635.

The spelling of 1243739448 in words is "one billion, two hundred forty-three million, seven hundred thirty-nine thousand, four hundred forty-eight".