138293824 has 14 divisors (see below), whose sum is σ = 274426934. Its totient is φ = 69146880.

The previous prime is 138293797. The next prime is 138293833. The reversal of 138293824 is 428392831.

It can be written as a sum of positive squares in only one way, i.e., 136422400 + 1871424 = 11680^2 + 1368^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080357 + ... + 1080484.

Almost surely, 2^138293824 is an apocalyptic number.

It is an amenable number.

138293824 is a deficient number, since it is larger than the sum of its proper divisors (136133110).

138293824 is an equidigital number, since it uses as much as digits as its factorization.

138293824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160853 (or 2160843 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 138293824 is about 11759.8394546864. The cubic root of 138293824 is about 517.1314235511.

The spelling of 138293824 in words is "one hundred thirty-eight million, two hundred ninety-three thousand, eight hundred twenty-four".