138495744 has 90 divisors (see below), whose sum is σ = 413031080. Its totient is φ = 46158336.

The previous prime is 138495739. The next prime is 138495761. The reversal of 138495744 is 447594831.

138495744 is a `hidden beast` number, since 1 + 38 + 49 + 574 + 4 = 666.

It is a super-2 number, since 2×138495744² = 38362142212227072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138495744.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17397 + ... + 24075.

Almost surely, 2^138495744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138495744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206515540).

138495744 is an abundant number, since it is smaller than the sum of its proper divisors (274535336).

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

138495744 is an frugal number, since it uses more digits than its factorization.

138495744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707 (or 6684 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 138495744 is about 11768.4214744374. The cubic root of 138495744 is about 517.3829855155.

The spelling of 138495744 in words is "one hundred thirty-eight million, four hundred ninety-five thousand, seven hundred forty-four".