1242888188 has 12 divisors (see below), whose sum is σ = 2186443392. Its totient is φ = 618190080.

The previous prime is 1242888187. The next prime is 1242888193. The reversal of 1242888188 is 8818882421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242888181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812645 + ... + 814172.

It is an arithmetic number, because the mean of its divisors is an integer number (182203616).

Almost surely, 2^1242888188 is an apocalyptic number.

It is an amenable number.

1242888188 is a deficient number, since it is larger than the sum of its proper divisors (943555204).

1242888188 is a wasteful number, since it uses less digits than its factorization.

1242888188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627012 (or 1627010 counting only the distinct ones).

The product of its digits is 524288, while the sum is 50.

The square root of 1242888188 is about 35254.6193852664. The cubic root of 1242888188 is about 1075.1705337534.

The spelling of 1242888188 in words is "one billion, two hundred forty-two million, eight hundred eighty-eight thousand, one hundred eighty-eight".