138435330 has 64 divisors (see below), whose sum is σ = 381542400. Its totient is φ = 31792320.

The previous prime is 138435313. The next prime is 138435331. The reversal of 138435330 is 33534831.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138435331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4770 + ... + 17309.

It is an arithmetic number, because the mean of its divisors is an integer number (5961600).

Almost surely, 2^138435330 is an apocalyptic number.

138435330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138435330 is an abundant number, since it is smaller than the sum of its proper divisors (243107070).

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

138435330 is a wasteful number, since it uses less digits than its factorization.

138435330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22119.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 138435330 is about 11765.8544101140. The cubic root of 138435330 is about 517.3077444026.

The spelling of 138435330 in words is "one hundred thirty-eight million, four hundred thirty-five thousand, three hundred thirty".