138852870 has 64 divisors (see below), whose sum is σ = 371286720. Its totient is φ = 32997888.

The previous prime is 138852869. The next prime is 138852871. The reversal of 138852870 is 78258831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138852869) and next prime (138852871).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138852871) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5172 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (5801355).

Almost surely, 2^138852870 is an apocalyptic number.

138852870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138852870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185643360).

138852870 is an abundant number, since it is smaller than the sum of its proper divisors (232433850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138852870 is a wasteful number, since it uses less digits than its factorization.

138852870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12329.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 138852870 is about 11783.5847686517. The cubic root of 138852870 is about 517.8273128302.

The spelling of 138852870 in words is "one hundred thirty-eight million, eight hundred fifty-two thousand, eight hundred seventy".