740138 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 306096.

The previous prime is 740123. The next prime is 740141. The reversal of 740138 is 831047.

It is a happy number.

740138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 740138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506 + ... + 1317.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2⁷⁴⁰¹³⁸ is an apocalyptic number.

740138 is a deficient number, since it is larger than the sum of its proper divisors (573142).

740138 is a wasteful number, since it uses less digits than its factorization.

740138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 740138 is about 860.3127338358. The cubic root of 740138 is about 90.4560392091.

Subtracting 740138 from its reverse (831047), we obtain a palindrome (90909).

It can be divided in two parts, 740 and 138, that added together give a palindrome (878).

The spelling of 740138 in words is "seven hundred forty thousand, one hundred thirty-eight".