138628760 has 32 divisors (see below), whose sum is σ = 317206800. Its totient is φ = 54510720.

The previous prime is 138628757. The next prime is 138628771. The reversal of 138628760 is 67826831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27011 + ... + 31730.

Almost surely, 2^138628760 is an apocalyptic number.

138628760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138628760 is an abundant number, since it is smaller than the sum of its proper divisors (178578040).

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

138628760 is a wasteful number, since it uses less digits than its factorization.

138628760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58811 (or 58807 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 138628760 is about 11774.0715132872. The cubic root of 138628760 is about 517.5485698927.

It can be divided in two parts, 13862 and 8760, that added together give a palindrome (22622).

The spelling of 138628760 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, seven hundred sixty".