138602530 has 128 divisors (see below), whose sum is σ = 313528320. Its totient is φ = 43453440.

The previous prime is 138602521. The next prime is 138602533. The reversal of 138602530 is 35206831.

138602530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138602530² = 38421322644801800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138602533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1669869 + ... + 1669951.

It is an arithmetic number, because the mean of its divisors is an integer number (2449440).

Almost surely, 2^138602530 is an apocalyptic number.

138602530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138602530 is an abundant number, since it is smaller than the sum of its proper divisors (174925790).

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

138602530 is a wasteful number, since it uses less digits than its factorization.

138602530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 138602530 is about 11772.9575723350. The cubic root of 138602530 is about 517.5159259803.

The spelling of 138602530 in words is "one hundred thirty-eight million, six hundred two thousand, five hundred thirty".