138241380 has 24 divisors (see below), whose sum is σ = 387076032. Its totient is φ = 36864352.

The previous prime is 138241379. The next prime is 138241391. The reversal of 138241380 is 83142831.

It is a super-2 number, since 2×138241380² = 38221358288608800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151952 + ... + 1152071.

It is an arithmetic number, because the mean of its divisors is an integer number (16128168).

Almost surely, 2^138241380 is an apocalyptic number.

138241380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138241380 is an abundant number, since it is smaller than the sum of its proper divisors (248834652).

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

138241380 is a wasteful number, since it uses less digits than its factorization.

138241380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304035 (or 2304033 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 138241380 is about 11757.6094509046. The cubic root of 138241380 is about 517.0660461574.

The spelling of 138241380 in words is "one hundred thirty-eight million, two hundred forty-one thousand, three hundred eighty".