11230143988 has 18 divisors (see below), whose sum is σ = 22861364946. Its totient is φ = 4812918768.

The previous prime is 11230143973. The next prime is 11230144001. The reversal of 11230143988 is 88934103211.

It can be written as a sum of positive squares in only one way, i.e., 11122233444 + 107910544 = 105462^2 + 10388^2 .

It is a super-2 number, since 2×11230143988² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11230143988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28648131 + ... + 28648522.

Almost surely, 2^11230143988 is an apocalyptic number.

It is an amenable number.

11230143988 is an abundant number, since it is smaller than the sum of its proper divisors (11631220958).

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

11230143988 is a wasteful number, since it uses less digits than its factorization.

11230143988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57296671 (or 57296662 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 11230143988 in words is "eleven billion, two hundred thirty million, one hundred forty-three thousand, nine hundred eighty-eight".