138386850 has 48 divisors (see below), whose sum is σ = 392230848. Its totient is φ = 31631040.

The previous prime is 138386839. The next prime is 138386863. The reversal of 138386850 is 58683831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64849 + ... + 66948.

It is an arithmetic number, because the mean of its divisors is an integer number (8171476).

Almost surely, 2^138386850 is an apocalyptic number.

138386850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138386850 is an abundant number, since it is smaller than the sum of its proper divisors (253843998).

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

138386850 is a wasteful number, since it uses less digits than its factorization.

138386850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131819 (or 131814 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 138386850 is about 11763.7940308389. The cubic root of 138386850 is about 517.2473503602.

The spelling of 138386850 in words is "one hundred thirty-eight million, three hundred eighty-six thousand, eight hundred fifty".