138898735 has 8 divisors (see below), whose sum is σ = 168329376. Its totient is φ = 110018400.

The previous prime is 138898717. The next prime is 138898741. The reversal of 138898735 is 537898831.

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

It is not a de Polignac number, because 138898735 - 2¹¹ = 138896687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137019 + ... + 138028.

It is an arithmetic number, because the mean of its divisors is an integer number (21041172).

Almost surely, 2^138898735 is an apocalyptic number.

138898735 is a deficient number, since it is larger than the sum of its proper divisors (29430641).

138898735 is a wasteful number, since it uses less digits than its factorization.

138898735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275153.

The product of its digits is 1451520, while the sum is 52.

The square root of 138898735 is about 11785.5307474886. The cubic root of 138898735 is about 517.8843216991.

The spelling of 138898735 in words is "one hundred thirty-eight million, eight hundred ninety-eight thousand, seven hundred thirty-five".