1143500400 has 180 divisors, whose sum is σ = 4535258832. Its totient is φ = 261365760.

The previous prime is 1143500381. The next prime is 1143500411. The reversal of 1143500400 is 40053411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2512 + ... + 47888.

Almost surely, 2^1143500400 is an apocalyptic number.

1143500400 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 1143500400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267629416).

1143500400 is an abundant number, since it is smaller than the sum of its proper divisors (3391758432).

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

1143500400 is a wasteful number, since it uses less digits than its factorization.

1143500400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45408 (or 45394 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1143500400 is about 33815.6827522379. The cubic root of 1143500400 is about 1045.7120365701.

Adding to 1143500400 its reverse (40053411), we get a palindrome (1183553811).

The spelling of 1143500400 in words is "one billion, one hundred forty-three million, five hundred thousand, four hundred".