138407426 has 8 divisors (see below), whose sum is σ = 207662400. Its totient is φ = 69186628.

The previous prime is 138407407. The next prime is 138407453. The reversal of 138407426 is 624704831.

138407426 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7955 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (25957800).

Almost surely, 2^138407426 is an apocalyptic number.

138407426 is a deficient number, since it is larger than the sum of its proper divisors (69254974).

138407426 is a wasteful number, since it uses less digits than its factorization.

138407426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17088.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 138407426 is about 11764.6685461172. The cubic root of 138407426 is about 517.2729846697.

The spelling of 138407426 in words is "one hundred thirty-eight million, four hundred seven thousand, four hundred twenty-six".