1139240448 has 120 divisors (see below), whose sum is σ = 3481571808. Its totient is φ = 357384192.

The previous prime is 1139240447. The next prime is 1139240503. The reversal of 1139240448 is 8440429311.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139240447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71065 + ... + 85607.

Almost surely, 2^1139240448 is an apocalyptic number.

1139240448 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 1139240448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740785904).

1139240448 is an abundant number, since it is smaller than the sum of its proper divisors (2342331360).

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

1139240448 is a wasteful number, since it uses less digits than its factorization.

1139240448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14584 (or 14565 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1139240448 is about 33752.6361637132. The cubic root of 1139240448 is about 1044.4118690241.

Adding to 1139240448 its reverse (8440429311), we get a palindrome (9579669759).

The spelling of 1139240448 in words is "one billion, one hundred thirty-nine million, two hundred forty thousand, four hundred forty-eight".