138788410 has 8 divisors (see below), whose sum is σ = 249819156. Its totient is φ = 55515360.

The previous prime is 138788401. The next prime is 138788413. The reversal of 138788410 is 14887831.

138788410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 126405049 + 12383361 = 11243^2 + 3519^2 .

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

It is not an unprimeable number, because it can be changed into a prime (138788413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6939411 + ... + 6939430.

Almost surely, 2^138788410 is an apocalyptic number.

138788410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138788410 is a deficient number, since it is larger than the sum of its proper divisors (111030746).

138788410 is a wasteful number, since it uses less digits than its factorization.

138788410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13878848.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 138788410 is about 11780.8492902677. The cubic root of 138788410 is about 517.7471696898.

The spelling of 138788410 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, four hundred ten".