138860000 has 120 divisors (see below), whose sum is σ = 350718984. Its totient is φ = 54080000.

The previous prime is 138859991. The next prime is 138860003. The reversal of 138860000 is 68831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138860003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1059935 + ... + 1060065.

Almost surely, 2^138860000 is an apocalyptic number.

138860000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138860000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175359492).

138860000 is an abundant number, since it is smaller than the sum of its proper divisors (211858984).

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

138860000 is an equidigital number, since it uses as much as digits as its factorization.

138860000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 138860000 is about 11783.8873042812. The cubic root of 138860000 is about 517.8361760380.

The spelling of 138860000 in words is "one hundred thirty-eight million, eight hundred sixty thousand".