138850240 has 56 divisors (see below), whose sum is σ = 341327232. Its totient is φ = 53744640.

The previous prime is 138850211. The next prime is 138850247. The reversal of 138850240 is 42058831.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138850247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2922 + ... + 16918.

Almost surely, 2^138850240 is an apocalyptic number.

138850240 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 138850240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170663616).

138850240 is an abundant number, since it is smaller than the sum of its proper divisors (202476992).

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

138850240 is a wasteful number, since it uses less digits than its factorization.

138850240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14045 (or 14035 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 138850240 is about 11783.4731722018. The cubic root of 138850240 is about 517.8240434357.

The spelling of 138850240 in words is "one hundred thirty-eight million, eight hundred fifty thousand, two hundred forty".