138845574 has 48 divisors (see below), whose sum is σ = 348960768. Its totient is φ = 39075696.

The previous prime is 138845573. The next prime is 138845611. The reversal of 138845574 is 475548831.

138845574 is a `hidden beast` number, since 1 + 38 + 8 + 45 + 574 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138845573) 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, 219 + ... + 16665.

It is an arithmetic number, because the mean of its divisors is an integer number (7270016).

Almost surely, 2^138845574 is an apocalyptic number.

138845574 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138845574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174480384).

138845574 is an abundant number, since it is smaller than the sum of its proper divisors (210115194).

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

138845574 is a wasteful number, since it uses less digits than its factorization.

138845574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16529 (or 16526 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 138845574 is about 11783.2751813747. The cubic root of 138845574 is about 517.8182429558.

The spelling of 138845574 in words is "one hundred thirty-eight million, eight hundred forty-five thousand, five hundred seventy-four".