1143436860 has 72 divisors (see below), whose sum is σ = 3580327296. Its totient is φ = 295079040.

The previous prime is 1143436849. The next prime is 1143436871. The reversal of 1143436860 is 686343411.

It is a happy number.

1143436860 is a `hidden beast` number, since 1 + 143 + 436 + 86 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1143436849) and next prime (1143436871).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96879 + ... + 108038.

It is an arithmetic number, because the mean of its divisors is an integer number (49726768).

Almost surely, 2^1143436860 is an apocalyptic number.

1143436860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143436860 is an abundant number, since it is smaller than the sum of its proper divisors (2436890436).

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

1143436860 is a wasteful number, since it uses less digits than its factorization.

1143436860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204963 (or 204958 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1143436860 is about 33814.7432342758. The cubic root of 1143436860 is about 1045.6926674547.

The spelling of 1143436860 in words is "one billion, one hundred forty-three million, four hundred thirty-six thousand, eight hundred sixty".