1143290988 has 36 divisors (see below), whose sum is σ = 3302841360. Its totient is φ = 326654496.

The previous prime is 1143290977. The next prime is 1143291001. The reversal of 1143290988 is 8890923411.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1143290988² = 2614228566484032288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2268183 + ... + 2268686.

Almost surely, 2^1143290988 is an apocalyptic number.

1143290988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1143290988 is an abundant number, since it is smaller than the sum of its proper divisors (2159550372).

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

1143290988 is a wasteful number, since it uses less digits than its factorization.

1143290988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536886 (or 4536881 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1143290988 is about 33812.5862364889. The cubic root of 1143290988 is about 1045.6481980796.

The spelling of 1143290988 in words is "one billion, one hundred forty-three million, two hundred ninety thousand, nine hundred eighty-eight".