748138 has 4 divisors (see below), whose sum is σ = 1122210. Its totient is φ = 374068.

The previous prime is 748133. The next prime is 748169. The reversal of 748138 is 831847.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 734449 + 13689 = 857^2 + 117^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (748133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187033 + ... + 187036.

2⁷⁴⁸¹³⁸ is an apocalyptic number.

748138 is a deficient number, since it is larger than the sum of its proper divisors (374072).

748138 is a wasteful number, since it uses less digits than its factorization.

748138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374071.

The product of its digits is 5376, while the sum is 31.

The square root of 748138 is about 864.9497095207. The cubic root of 748138 is about 90.7807789210.

The spelling of 748138 in words is "seven hundred forty-eight thousand, one hundred thirty-eight".