138005330 has 8 divisors (see below), whose sum is σ = 248409612. Its totient is φ = 55202128.

The previous prime is 138005299. The next prime is 138005333. The reversal of 138005330 is 33500831.

It can be written as a sum of positive squares in 2 ways, for example, as 121594729 + 16410601 = 11027^2 + 4051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138005330² = 38090942216817800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138005296 and 138005305.

It is not an unprimeable number, because it can be changed into a prime (138005333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6900257 + ... + 6900276.

Almost surely, 2^138005330 is an apocalyptic number.

138005330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138005330 is a deficient number, since it is larger than the sum of its proper divisors (110404282).

138005330 is a wasteful number, since it uses less digits than its factorization.

138005330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13800540.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 138005330 is about 11747.5669821457. The cubic root of 138005330 is about 516.7715781871.

The spelling of 138005330 in words is "one hundred thirty-eight million, five thousand, three hundred thirty".