138704726 has 16 divisors (see below), whose sum is σ = 215129088. Its totient is φ = 67002600.

The previous prime is 138704711. The next prime is 138704729. The reversal of 138704726 is 627407831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138704726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138704729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44561 + ... + 47571.

It is an arithmetic number, because the mean of its divisors is an integer number (13445568).

Almost surely, 2^138704726 is an apocalyptic number.

138704726 is a deficient number, since it is larger than the sum of its proper divisors (76424362).

138704726 is a wasteful number, since it uses less digits than its factorization.

138704726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 138704726 is about 11777.2970583237. The cubic root of 138704726 is about 517.6430883157.

The spelling of 138704726 in words is "one hundred thirty-eight million, seven hundred four thousand, seven hundred twenty-six".