1143745408 has 64 divisors (see below), whose sum is σ = 2481721200. Its totient is φ = 521883648.

The previous prime is 1143745399. The next prime is 1143745417. The reversal of 1143745408 is 8045473411.

It is an interprime number because it is at equal distance from previous prime (1143745399) and next prime (1143745417).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 144235 + ... + 151957.

Almost surely, 2^1143745408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143745408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240860600).

1143745408 is an abundant number, since it is smaller than the sum of its proper divisors (1337975792).

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

1143745408 is an equidigital number, since it uses as much as digits as its factorization.

1143745408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7839 (or 7827 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1143745408 is about 33819.3052560220. The cubic root of 1143745408 is about 1045.7867164793.

The spelling of 1143745408 in words is "one billion, one hundred forty-three million, seven hundred forty-five thousand, four hundred eight".