138526452 has 36 divisors (see below), whose sum is σ = 350584416. Its totient is φ = 46120080.

The previous prime is 138526441. The next prime is 138526459. The reversal of 138526452 is 254625831.

138526452 is a `hidden beast` number, since 1 + 3 + 8 + 5 + 2 + 645 + 2 = 666.

138526452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138526459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37513 + ... + 41039.

It is an arithmetic number, because the mean of its divisors is an integer number (9738456).

Almost surely, 2^138526452 is an apocalyptic number.

138526452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138526452 is an abundant number, since it is smaller than the sum of its proper divisors (212057964).

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

138526452 is a wasteful number, since it uses less digits than its factorization.

138526452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4623 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 138526452 is about 11769.7260800751. The cubic root of 138526452 is about 517.4212216427.

The spelling of 138526452 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, four hundred fifty-two".