1138988 has 6 divisors (see below), whose sum is σ = 1993236. Its totient is φ = 569492.

The previous prime is 1138987. The next prime is 1138997. The reversal of 1138988 is 8898311.

It is not an unprimeable number, because it can be changed into a prime (1138987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142370 + ... + 142377.

It is an arithmetic number, because the mean of its divisors is an integer number (332206).

2^1138988 is an apocalyptic number.

It is an amenable number.

1138988 is a deficient number, since it is larger than the sum of its proper divisors (854248).

1138988 is a wasteful number, since it uses less digits than its factorization.

1138988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284751 (or 284749 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 1138988 is about 1067.2338075605. The cubic root of 1138988 is about 104.4334718450.

The spelling of 1138988 in words is "one million, one hundred thirty-eight thousand, nine hundred eighty-eight".