138302340 has 48 divisors (see below), whose sum is σ = 422452800. Its totient is φ = 33527680.

The previous prime is 138302321. The next prime is 138302347. The reversal of 138302340 is 43203831.

It is a self number, because there is not a number n which added to its sum of digits gives 138302340.

It is not an unprimeable number, because it can be changed into a prime (138302347) 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, 104115 + ... + 105434.

It is an arithmetic number, because the mean of its divisors is an integer number (8801100).

Almost surely, 2^138302340 is an apocalyptic number.

138302340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138302340 is an abundant number, since it is smaller than the sum of its proper divisors (284150460).

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

138302340 is a wasteful number, since it uses less digits than its factorization.

138302340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209572 (or 209570 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 138302340 is about 11760.2015288855. The cubic root of 138302340 is about 517.1420381509.

The spelling of 138302340 in words is "one hundred thirty-eight million, three hundred two thousand, three hundred forty".