138591852 has 48 divisors (see below), whose sum is σ = 389034240. Its totient is φ = 37513152.

The previous prime is 138591851. The next prime is 138591853. The reversal of 138591852 is 258195831.

138591852 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138591851) and next prime (138591853).

It is a Harshad number since it is a multiple of its sum of digits (42).

138591852 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (138591851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41823 + ... + 45014.

It is an arithmetic number, because the mean of its divisors is an integer number (8104880).

Almost surely, 2^138591852 is an apocalyptic number.

138591852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138591852 is an abundant number, since it is smaller than the sum of its proper divisors (250442388).

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

138591852 is a wasteful number, since it uses less digits than its factorization.

138591852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86870 (or 86868 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The square root of 138591852 is about 11772.5040666801. The cubic root of 138591852 is about 517.5026357540.

The spelling of 138591852 in words is "one hundred thirty-eight million, five hundred ninety-one thousand, eight hundred fifty-two".