1142636544 has 360 divisors, whose sum is σ = 4007535168. Its totient is φ = 318504960.

The previous prime is 1142636519. The next prime is 1142636591. The reversal of 1142636544 is 4456362411.

1142636544 is a `hidden beast` number, since 1 + 14 + 2 + 636 + 5 + 4 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1142636499 and 1142636508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27869164 + ... + 27869204.

Almost surely, 2^1142636544 is an apocalyptic number.

1142636544 is a gapful number since it is divisible by the number (14) 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 1142636544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003767584).

1142636544 is an abundant number, since it is smaller than the sum of its proper divisors (2864898624).

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

1142636544 is an frugal number, since it uses more digits than its factorization.

1142636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 53 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1142636544 is about 33802.9073305833. The cubic root of 1142636544 is about 1045.4486429326.

Adding to 1142636544 its reverse (4456362411), we get a palindrome (5598998955).

The spelling of 1142636544 in words is "one billion, one hundred forty-two million, six hundred thirty-six thousand, five hundred forty-four".