138208430 has 8 divisors (see below), whose sum is σ = 248775192. Its totient is φ = 55283368.

The previous prime is 138208423. The next prime is 138208457. The reversal of 138208430 is 34802831.

It is a happy number.

138208430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 138208393 and 138208402.

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, 6910412 + ... + 6910431.

It is an arithmetic number, because the mean of its divisors is an integer number (31096899).

Almost surely, 2^138208430 is an apocalyptic number.

138208430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138208430 is a deficient number, since it is larger than the sum of its proper divisors (110566762).

138208430 is a wasteful number, since it uses less digits than its factorization.

138208430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13820850.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 138208430 is about 11756.2081471876. The cubic root of 138208430 is about 517.0249617874.

The spelling of 138208430 in words is "one hundred thirty-eight million, two hundred eight thousand, four hundred thirty".