138430 has 16 divisors (see below), whose sum is σ = 253440. Its totient is φ = 54432.

The previous prime is 138427. The next prime is 138433. The reversal of 138430 is 34831.

It is an interprime number because it is at equal distance from previous prime (138427) and next prime (138433).

It is a junction number, because it is equal to n+sod(n) for n = 138398 and 138407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2¹³⁸⁴³⁰ is an apocalyptic number.

138430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138430 is a deficient number, since it is larger than the sum of its proper divisors (115010).

138430 is a wasteful number, since it uses less digits than its factorization.

138430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 138430 is about 372.0618228198. The cubic root of 138430 is about 51.7301105236.

It can be divided in two parts, 138 and 430, that multiplied together give a triangular number (59340 = T₃₄₄).

The spelling of 138430 in words is "one hundred thirty-eight thousand, four hundred thirty".