920490 has 32 divisors (see below), whose sum is σ = 2249856. Its totient is φ = 240960.

The previous prime is 920477. The next prime is 920497. The reversal of 920490 is 94029.

920490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 920490.

It is not an unprimeable number, because it can be changed into a prime (920497) by changing a digit.

920490 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 15 ways as a sum of consecutive naturals, for example, 1579 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁹²⁰⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124928).

920490 is an abundant number, since it is smaller than the sum of its proper divisors (1329366).

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

920490 is a wasteful number, since it uses less digits than its factorization.

920490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

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

The square root of 920490 is about 959.4217008177. The cubic root of 920490 is about 97.2761465328.

The spelling of 920490 in words is "nine hundred twenty thousand, four hundred ninety".