138405358 has 32 divisors (see below), whose sum is σ = 257402880. Its totient is φ = 54349920.

The previous prime is 138405349. The next prime is 138405383. The reversal of 138405358 is 853504831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22563 + ... + 28033.

It is an arithmetic number, because the mean of its divisors is an integer number (8043840).

Almost surely, 2^138405358 is an apocalyptic number.

138405358 is a deficient number, since it is larger than the sum of its proper divisors (118997522).

138405358 is a wasteful number, since it uses less digits than its factorization.

138405358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 138405358 is about 11764.5806555100. The cubic root of 138405358 is about 517.2704083969.

The spelling of 138405358 in words is "one hundred thirty-eight million, four hundred five thousand, three hundred fifty-eight".