8138748 has 12 divisors (see below), whose sum is σ = 18990440. Its totient is φ = 2712912.

The previous prime is 8138747. The next prime is 8138761. The reversal of 8138748 is 8478318.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138743) 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, 339103 + ... + 339126.

Almost surely, 2^8138748 is an apocalyptic number.

It is an amenable number.

8138748 is an abundant number, since it is smaller than the sum of its proper divisors (10851692).

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

8138748 is a wasteful number, since it uses less digits than its factorization.

8138748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678236 (or 678234 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 8138748 is about 2852.8491022134. The cubic root of 8138748 is about 201.1496126262.

The spelling of 8138748 in words is "eight million, one hundred thirty-eight thousand, seven hundred forty-eight".