1129724888 has 8 divisors (see below), whose sum is σ = 2118234180. Its totient is φ = 564862440.

The previous prime is 1129724887. The next prime is 1129724891. The reversal of 1129724888 is 8884279211.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1129724888² = 2552556645133225088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129724887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70607798 + ... + 70607813.

Almost surely, 2^1129724888 is an apocalyptic number.

It is an amenable number.

1129724888 is a deficient number, since it is larger than the sum of its proper divisors (988509292).

1129724888 is a wasteful number, since it uses less digits than its factorization.

1129724888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141215617 (or 141215613 counting only the distinct ones).

The product of its digits is 516096, while the sum is 50.

The square root of 1129724888 is about 33611.3803346426. The cubic root of 1129724888 is about 1041.4959020454.

The spelling of 1129724888 in words is "one billion, one hundred twenty-nine million, seven hundred twenty-four thousand, eight hundred eighty-eight".