392420 has 24 divisors (see below), whose sum is σ = 942144. Its totient is φ = 134496.

The previous prime is 392389. The next prime is 392423. The reversal of 392420 is 24293.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 392392 and 392401.

It is not an unprimeable number, because it can be changed into a prime (392423) by changing a digit.

392420 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 7 ways as a sum of consecutive naturals, for example, 1262 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (39256).

2³⁹²⁴²⁰ is an apocalyptic number.

It is an amenable number.

392420 is an abundant number, since it is smaller than the sum of its proper divisors (549724).

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

392420 is a wasteful number, since it uses less digits than its factorization.

392420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819 (or 2817 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 392420 is about 626.4343541026. The cubic root of 392420 is about 73.2122427690.

The spelling of 392420 in words is "three hundred ninety-two thousand, four hundred twenty".