138341428 has 12 divisors (see below), whose sum is σ = 242331460. Its totient is φ = 69103872.

The previous prime is 138341407. The next prime is 138341431. The reversal of 138341428 is 824143831.

138341428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 95804944 + 42536484 = 9788^2 + 6522^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138341393 and 138341402.

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, 11901 + ... + 20452.

Almost surely, 2^138341428 is an apocalyptic number.

It is an amenable number.

138341428 is a deficient number, since it is larger than the sum of its proper divisors (103990032).

138341428 is a wasteful number, since it uses less digits than its factorization.

138341428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33426 (or 33424 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 138341428 is about 11761.8632877619. The cubic root of 138341428 is about 517.1907530267.

The spelling of 138341428 in words is "one hundred thirty-eight million, three hundred forty-one thousand, four hundred twenty-eight".