138487000 has 64 divisors (see below), whose sum is σ = 328348800. Its totient is φ = 54662400.

The previous prime is 138486973. The next prime is 138487001. The reversal of 138487000 is 784831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138487001) 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, 78124 + ... + 79876.

It is an arithmetic number, because the mean of its divisors is an integer number (5130450).

Almost surely, 2^138487000 is an apocalyptic number.

138487000 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 138487000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164174400).

138487000 is an abundant number, since it is smaller than the sum of its proper divisors (189861800).

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

138487000 is a wasteful number, since it uses less digits than its factorization.

138487000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 138487000 is about 11768.0499659034. The cubic root of 138487000 is about 517.3720968728.

The spelling of 138487000 in words is "one hundred thirty-eight million, four hundred eighty-seven thousand".