138362730 has 32 divisors (see below), whose sum is σ = 362259648. Its totient is φ = 33542400.

The previous prime is 138362723. The next prime is 138362759. The reversal of 138362730 is 37263831.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 138362691 and 138362700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209311 + ... + 209970.

It is an arithmetic number, because the mean of its divisors is an integer number (11320614).

Almost surely, 2^138362730 is an apocalyptic number.

138362730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138362730 is an abundant number, since it is smaller than the sum of its proper divisors (223896918).

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

138362730 is a wasteful number, since it uses less digits than its factorization.

138362730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419302.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 138362730 is about 11762.7688067053. The cubic root of 138362730 is about 517.2172975746.

The spelling of 138362730 in words is "one hundred thirty-eight million, three hundred sixty-two thousand, seven hundred thirty".