138567870 has 192 divisors, whose sum is σ = 438856704. Its totient is φ = 29652480.

The previous prime is 138567853. The next prime is 138567883. The reversal of 138567870 is 78765831.

138567870 is a `hidden beast` number, since 1 + 3 + 8 + 567 + 87 + 0 = 666.

138567870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 1057705 + ... + 1057835.

It is an arithmetic number, because the mean of its divisors is an integer number (2285712).

Almost surely, 2^138567870 is an apocalyptic number.

138567870 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 138567870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219428352).

138567870 is an abundant number, since it is smaller than the sum of its proper divisors (300288834).

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

138567870 is a wasteful number, since it uses less digits than its factorization.

138567870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 138567870 is about 11771.4854627613. The cubic root of 138567870 is about 517.4727843980.

The spelling of 138567870 in words is "one hundred thirty-eight million, five hundred sixty-seven thousand, eight hundred seventy".