1143564896 has 48 divisors (see below), whose sum is σ = 2317787136. Its totient is φ = 555117696.

The previous prime is 1143564817. The next prime is 1143564901. The reversal of 1143564896 is 6984653411.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 1143564896.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188015 + ... + 194001.

It is an arithmetic number, because the mean of its divisors is an integer number (48287232).

Almost surely, 2^1143564896 is an apocalyptic number.

1143564896 is a gapful number since it is divisible by the number (16) 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 1143564896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158893568).

1143564896 is an abundant number, since it is smaller than the sum of its proper divisors (1174222240).

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

1143564896 is a wasteful number, since it uses less digits than its factorization.

1143564896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171 (or 6163 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 1143564896 is about 33816.6363791552. The cubic root of 1143564896 is about 1045.7316963724.

The spelling of 1143564896 in words is "one billion, one hundred forty-three million, five hundred sixty-four thousand, eight hundred ninety-six".