138812835 has 24 divisors (see below), whose sum is σ = 258363216. Its totient is φ = 63456960.

The previous prime is 138812833. The next prime is 138812887. The reversal of 138812835 is 538218831.

It is not a de Polignac number, because 138812835 - 2¹ = 138812833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138812793 and 138812802.

It is not an unprimeable number, because it can be changed into a prime (138812831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93696 + ... + 95165.

It is an arithmetic number, because the mean of its divisors is an integer number (10765134).

Almost surely, 2^138812835 is an apocalyptic number.

138812835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138812835 is a deficient number, since it is larger than the sum of its proper divisors (119550381).

138812835 is a wasteful number, since it uses less digits than its factorization.

138812835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188883 (or 188876 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 138812835 is about 11781.8858846960. The cubic root of 138812835 is about 517.7775402202. Note that the first 3 decimals are identical.

The spelling of 138812835 in words is "one hundred thirty-eight million, eight hundred twelve thousand, eight hundred thirty-five".