138709480 has 128 divisors (see below), whose sum is σ = 391910400. Its totient is φ = 43011072.

The previous prime is 138709471. The next prime is 138709499. The reversal of 138709480 is 84907831.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192561 + ... + 193279.

It is an arithmetic number, because the mean of its divisors is an integer number (3061800).

Almost surely, 2^138709480 is an apocalyptic number.

138709480 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 138709480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195955200).

138709480 is an abundant number, since it is smaller than the sum of its proper divisors (253200920).

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

138709480 is a wasteful number, since it uses less digits than its factorization.

138709480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 138709480 is about 11777.4988855869. The cubic root of 138709480 is about 517.6490021905.

The spelling of 138709480 in words is "one hundred thirty-eight million, seven hundred nine thousand, four hundred eighty".