1143354420 has 192 divisors, whose sum is σ = 3851258880. Its totient is φ = 279936000.

The previous prime is 1143354409. The next prime is 1143354467. The reversal of 1143354420 is 244533411.

It is a happy number.

1143354420 is a `hidden beast` number, since 114 + 3 + 3 + 544 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 63 ways as a sum of consecutive naturals, for example, 1902120 + ... + 1902720.

It is an arithmetic number, because the mean of its divisors is an integer number (20058640).

Almost surely, 2^1143354420 is an apocalyptic number.

1143354420 is a gapful number since it is divisible by the number (10) 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 1143354420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1925629440).

1143354420 is an abundant number, since it is smaller than the sum of its proper divisors (2707904460).

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

1143354420 is a wasteful number, since it uses less digits than its factorization.

1143354420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1143354420 is about 33813.5242173897. The cubic root of 1143354420 is about 1045.6675359182.

Adding to 1143354420 its reverse (244533411), we get a palindrome (1387887831).

The spelling of 1143354420 in words is "one billion, one hundred forty-three million, three hundred fifty-four thousand, four hundred twenty".