138869760 has 88 divisors (see below), whose sum is σ = 444215376. Its totient is φ = 37027840.

The previous prime is 138869741. The next prime is 138869771. The reversal of 138869760 is 67968831.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10840 + ... + 19880.

It is an arithmetic number, because the mean of its divisors is an integer number (5047902).

Almost surely, 2^138869760 is an apocalyptic number.

138869760 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 138869760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222107688).

138869760 is an abundant number, since it is smaller than the sum of its proper divisors (305345616).

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

138869760 is an equidigital number, since it uses as much as digits as its factorization.

138869760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069 (or 9051 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 138869760 is about 11784.3014218069. The cubic root of 138869760 is about 517.8483080719.

The spelling of 138869760 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, seven hundred sixty".