390138 has 24 divisors (see below), whose sum is σ = 908352. Its totient is φ = 111384.

The previous prime is 390119. The next prime is 390151. The reversal of 390138 is 831093.

It is an unprimeable number.

390138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (37848).

2³⁹⁰¹³⁸ is an apocalyptic number.

390138 is an abundant number, since it is smaller than the sum of its proper divisors (518214).

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

390138 is a wasteful number, since it uses less digits than its factorization.

390138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 390138 is about 624.6102784937. The cubic root of 390138 is about 73.0700522271.

It can be divided in two parts, 390 and 138, that added together give a triangular number (528 = T₃₂).

The spelling of 390138 in words is "three hundred ninety thousand, one hundred thirty-eight".