1144004240 has 40 divisors (see below), whose sum is σ = 2661579648. Its totient is φ = 457297280.

The previous prime is 1144004227. The next prime is 1144004287. The reversal of 1144004240 is 424004411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1144004240² = 2617491402275955200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145859 + ... + 153501.

Almost surely, 2^1144004240 is an apocalyptic number.

1144004240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144004240 is an abundant number, since it is smaller than the sum of its proper divisors (1517575408).

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

1144004240 is a wasteful number, since it uses less digits than its factorization.

1144004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9527 (or 9521 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1144004240 is about 33823.1317296314. The cubic root of 1144004240 is about 1045.8655984430.

Adding to 1144004240 its reverse (424004411), we get a palindrome (1568008651).

The spelling of 1144004240 in words is "one billion, one hundred forty-four million, four thousand, two hundred forty".