138034830 has 32 divisors (see below), whose sum is σ = 331993728. Its totient is φ = 36730400.

The previous prime is 138034801. The next prime is 138034837. The reversal of 138034830 is 38430831.

138034830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138034830² = 38107228586257800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138034837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10045 + ... + 19415.

It is an arithmetic number, because the mean of its divisors is an integer number (10374804).

Almost surely, 2^138034830 is an apocalyptic number.

138034830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138034830 is an abundant number, since it is smaller than the sum of its proper divisors (193958898).

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

138034830 is a wasteful number, since it uses less digits than its factorization.

138034830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 138034830 is about 11748.8224941906. The cubic root of 138034830 is about 516.8083972371.

The spelling of 138034830 in words is "one hundred thirty-eight million, thirty-four thousand, eight hundred thirty".