1143238980 has 48 divisors (see below), whose sum is σ = 3447307584. Its totient is φ = 281412480.

The previous prime is 1143238973. The next prime is 1143238981. The reversal of 1143238980 is 898323411.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1143238981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732066 + ... + 733625.

It is an arithmetic number, because the mean of its divisors is an integer number (71818908).

Almost surely, 2^1143238980 is an apocalyptic number.

1143238980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143238980 is an abundant number, since it is smaller than the sum of its proper divisors (2304068604).

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

1143238980 is a wasteful number, since it uses less digits than its factorization.

1143238980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465716 (or 1465714 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1143238980 is about 33811.8171650090. The cubic root of 1143238980 is about 1045.6323424206.

The spelling of 1143238980 in words is "one billion, one hundred forty-three million, two hundred thirty-eight thousand, nine hundred eighty".