138410928 has 30 divisors (see below), whose sum is σ = 387358764. Its totient is φ = 46136928.

The previous prime is 138410927. The next prime is 138410929. The reversal of 138410928 is 829014831.

It is an interprime number because it is at equal distance from previous prime (138410927) and next prime (138410929).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 138410892 and 138410901.

It is not an unprimeable number, because it can be changed into a prime (138410927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 480450 + ... + 480737.

Almost surely, 2^138410928 is an apocalyptic number.

138410928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138410928 is an abundant number, since it is smaller than the sum of its proper divisors (248947836).

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

138410928 is a wasteful number, since it uses less digits than its factorization.

138410928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961201 (or 961192 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 138410928 is about 11764.8173806481. The cubic root of 138410928 is about 517.2773473324.

The spelling of 138410928 in words is "one hundred thirty-eight million, four hundred ten thousand, nine hundred twenty-eight".