1142553344 has 72 divisors (see below), whose sum is σ = 2348408832. Its totient is φ = 554480640.

The previous prime is 1142553343. The next prime is 1142553389. The reversal of 1142553344 is 4433552411.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1142553344.

It is not an unprimeable number, because it can be changed into a prime (1142553343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2982977 + ... + 2983359.

Almost surely, 2^1142553344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142553344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174204416).

1142553344 is an abundant number, since it is smaller than the sum of its proper divisors (1205855488).

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

1142553344 is an equidigital number, since it uses as much as digits as its factorization.

1142553344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 699 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 1142553344 is about 33801.6766448057. The cubic root of 1142553344 is about 1045.4232678651.

The spelling of 1142553344 in words is "one billion, one hundred forty-two million, five hundred fifty-three thousand, three hundred forty-four".