138303744 has 72 divisors (see below), whose sum is σ = 371942592. Its totient is φ = 45619200.

The previous prime is 138303733. The next prime is 138303757. The reversal of 138303744 is 447303831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76677 + ... + 78459.

Almost surely, 2^138303744 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 138303744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185971296).

138303744 is an abundant number, since it is smaller than the sum of its proper divisors (233638848).

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

138303744 is a wasteful number, since it uses less digits than its factorization.

138303744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 138303744 is about 11760.2612215886. The cubic root of 138303744 is about 517.1437880971.

The spelling of 138303744 in words is "one hundred thirty-eight million, three hundred three thousand, seven hundred forty-four".