138550880 has 96 divisors (see below), whose sum is σ = 358797600. Its totient is φ = 50245632.

The previous prime is 138550879. The next prime is 138550883. The reversal of 138550880 is 88055831.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138550883) 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, 122156 + ... + 123284.

It is an arithmetic number, because the mean of its divisors is an integer number (3737475).

Almost surely, 2^138550880 is an apocalyptic number.

138550880 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 138550880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179398800).

138550880 is an abundant number, since it is smaller than the sum of its proper divisors (220246720).

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

138550880 is a wasteful number, since it uses less digits than its factorization.

138550880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 138550880 is about 11770.7637815054. The cubic root of 138550880 is about 517.4516341801.

The spelling of 138550880 in words is "one hundred thirty-eight million, five hundred fifty thousand, eight hundred eighty".