138157340 has 12 divisors (see below), whose sum is σ = 290130456. Its totient is φ = 55262928.

The previous prime is 138157339. The next prime is 138157381. The reversal of 138157340 is 43751831.

138157340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138157297 and 138157306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3453914 + ... + 3453953.

It is an arithmetic number, because the mean of its divisors is an integer number (24177538).

Almost surely, 2^138157340 is an apocalyptic number.

138157340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138157340 is an abundant number, since it is smaller than the sum of its proper divisors (151973116).

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

138157340 is a wasteful number, since it uses less digits than its factorization.

138157340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907876 (or 6907874 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138157340 is about 11754.0350518450. The cubic root of 138157340 is about 516.9612462799.

The spelling of 138157340 in words is "one hundred thirty-eight million, one hundred fifty-seven thousand, three hundred forty".