138770140 has 48 divisors (see below), whose sum is σ = 296648352. Its totient is φ = 54521856.

The previous prime is 138770123. The next prime is 138770143. The reversal of 138770140 is 41077831.

138770140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138770143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451867 + ... + 452173.

It is an arithmetic number, because the mean of its divisors is an integer number (6180174).

Almost surely, 2^138770140 is an apocalyptic number.

138770140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138770140 is an abundant number, since it is smaller than the sum of its proper divisors (157878212).

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

138770140 is a wasteful number, since it uses less digits than its factorization.

138770140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 138770140 is about 11780.0738537583. The cubic root of 138770140 is about 517.7244500792.

The spelling of 138770140 in words is "one hundred thirty-eight million, seven hundred seventy thousand, one hundred forty".