138503734 has 16 divisors (see below), whose sum is σ = 212874480. Its totient is φ = 67560480.

The previous prime is 138503719. The next prime is 138503741. The reversal of 138503734 is 437305831.

It is a self number, because there is not a number n which added to its sum of digits gives 138503734.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15577 + ... + 22795.

It is an arithmetic number, because the mean of its divisors is an integer number (13304655).

Almost surely, 2^138503734 is an apocalyptic number.

138503734 is a deficient number, since it is larger than the sum of its proper divisors (74370746).

138503734 is a wasteful number, since it uses less digits than its factorization.

138503734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 138503734 is about 11768.7609373290. The cubic root of 138503734 is about 517.3929348238.

The spelling of 138503734 in words is "one hundred thirty-eight million, five hundred three thousand, seven hundred thirty-four".