1143210440 has 32 divisors (see below), whose sum is σ = 2573235000. Its totient is φ = 457104384.

The previous prime is 1143210413. The next prime is 1143210451. The reversal of 1143210440 is 440123411.

It can be written as a sum of positive squares in 4 ways, for example, as 1073086564 + 70123876 = 32758^2 + 8374^2 .

It is a super-2 number, since 2×1143210440² = 2613860220249987200, 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, 151886 + ... + 159234.

Almost surely, 2^1143210440 is an apocalyptic number.

1143210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143210440 is an abundant number, since it is smaller than the sum of its proper divisors (1430024560).

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

1143210440 is a wasteful number, since it uses less digits than its factorization.

1143210440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11249 (or 11245 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1143210440 is about 33811.3951205803. The cubic root of 1143210440 is about 1045.6236412374.

Adding to 1143210440 its reverse (440123411), we get a palindrome (1583333851).

The spelling of 1143210440 in words is "one billion, one hundred forty-three million, two hundred ten thousand, four hundred forty".