1143240400 has 30 divisors (see below), whose sum is σ = 2746636022. Its totient is φ = 457296000.

The previous prime is 1143240383. The next prime is 1143240401. The reversal of 1143240400 is 40423411.

It can be written as a sum of positive squares in 3 ways, for example, as 529984 + 1142710416 = 728^2 + 33804^2 .

It is a super-2 number, since 2×1143240400² = 2613997224384320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143240401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428651 + ... + 1429450.

Almost surely, 2^1143240400 is an apocalyptic number.

1143240400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143240400 is an abundant number, since it is smaller than the sum of its proper divisors (1603395622).

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

1143240400 is a wasteful number, since it uses less digits than its factorization.

1143240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858119 (or 2858108 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1143240400 is about 33811.8381635782. The cubic root of 1143240400 is about 1045.6327753419.

Adding to 1143240400 its reverse (40423411), we get a palindrome (1183663811).

The spelling of 1143240400 in words is "one billion, one hundred forty-three million, two hundred forty thousand, four hundred".