138045628 has 24 divisors (see below), whose sum is σ = 279877472. Its totient is φ = 58351104.

The previous prime is 138045619. The next prime is 138045629. The reversal of 138045628 is 826540831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138045629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31725 + ... + 35812.

Almost surely, 2^138045628 is an apocalyptic number.

It is an amenable number.

138045628 is an abundant number, since it is smaller than the sum of its proper divisors (141831844).

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

138045628 is a wasteful number, since it uses less digits than its factorization.

138045628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67621 (or 67619 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 138045628 is about 11749.2820206173. The cubic root of 138045628 is about 516.8218729460.

The spelling of 138045628 in words is "one hundred thirty-eight million, forty-five thousand, six hundred twenty-eight".