1243245988 has 24 divisors (see below), whose sum is σ = 2192220800. Its totient is φ = 616908960.

The previous prime is 1243245953. The next prime is 1243246009. The reversal of 1243245988 is 8895423421.

It is a super-2 number, since 2×1243245988² = 3091321173356192288, which contains 22 as substring.

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, 801838 + ... + 803386.

Almost surely, 2^1243245988 is an apocalyptic number.

It is an amenable number.

1243245988 is a deficient number, since it is larger than the sum of its proper divisors (948974812).

1243245988 is a wasteful number, since it uses less digits than its factorization.

1243245988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947 (or 2945 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The square root of 1243245988 is about 35259.6935324174. The cubic root of 1243245988 is about 1075.2736964545.

The spelling of 1243245988 in words is "one billion, two hundred forty-three million, two hundred forty-five thousand, nine hundred eighty-eight".