138330824 has 8 divisors (see below), whose sum is σ = 259370310. Its totient is φ = 69165408.

The previous prime is 138330781. The next prime is 138330833. The reversal of 138330824 is 428033831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 138062500 + 268324 = 11750^2 + 518^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8645669 + ... + 8645684.

Almost surely, 2^138330824 is an apocalyptic number.

It is an amenable number.

138330824 is a deficient number, since it is larger than the sum of its proper divisors (121039486).

138330824 is a wasteful number, since it uses less digits than its factorization.

138330824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291359 (or 17291355 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 138330824 is about 11761.4125002059. The cubic root of 138330824 is about 517.1775383039.

The spelling of 138330824 in words is "one hundred thirty-eight million, three hundred thirty thousand, eight hundred twenty-four".