392490 has 72 divisors (see below), whose sum is σ = 1200420. Its totient is φ = 88704.

The previous prime is 392489. The next prime is 392503. The reversal of 392490 is 94293.

392490 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 21609 = 609^2 + 147^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4366 + ... + 4454.

2³⁹²⁴⁹⁰ is an apocalyptic number.

392490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 392490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600210).

392490 is an abundant number, since it is smaller than the sum of its proper divisors (807930).

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

392490 is a wasteful number, since it uses less digits than its factorization.

392490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 392490 is about 626.4902233874. The cubic root of 392490 is about 73.2165957176.

The spelling of 392490 in words is "three hundred ninety-two thousand, four hundred ninety".