1138648 has 16 divisors (see below), whose sum is σ = 2440080. Its totient is φ = 487968.

The previous prime is 1138639. The next prime is 1138649. The reversal of 1138648 is 8468311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138649) 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, 10111 + ... + 10222.

It is an arithmetic number, because the mean of its divisors is an integer number (152505).

2^1138648 is an apocalyptic number.

It is an amenable number.

1138648 is an abundant number, since it is smaller than the sum of its proper divisors (1301432).

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

1138648 is a wasteful number, since it uses less digits than its factorization.

1138648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20346 (or 20342 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 1138648 is about 1067.0745053650. The cubic root of 1138648 is about 104.4230793111.

The spelling of 1138648 in words is "one million, one hundred thirty-eight thousand, six hundred forty-eight".