138705435 has 48 divisors (see below), whose sum is σ = 265674240. Its totient is φ = 66381120.

The previous prime is 138705409. The next prime is 138705449. The reversal of 138705435 is 534507831.

It is not a de Polignac number, because 138705435 - 2⁵ = 138705403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138705435.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37332 + ... + 40878.

It is an arithmetic number, because the mean of its divisors is an integer number (5534880).

Almost surely, 2^138705435 is an apocalyptic number.

138705435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138705435 is a deficient number, since it is larger than the sum of its proper divisors (126968805).

138705435 is a wasteful number, since it uses less digits than its factorization.

138705435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648 (or 3645 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 138705435 is about 11777.3271585704. The cubic root of 138705435 is about 517.6439703052.

The spelling of 138705435 in words is "one hundred thirty-eight million, seven hundred five thousand, four hundred thirty-five".