920440 has 16 divisors (see below), whose sum is σ = 2071080. Its totient is φ = 368160.

The previous prime is 920419. The next prime is 920441. The reversal of 920440 is 44029.

920440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920441) by changing a digit.

920440 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 3 ways as a sum of consecutive naturals, for example, 11466 + ... + 11545.

2⁹²⁰⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

920440 is an abundant number, since it is smaller than the sum of its proper divisors (1150640).

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

920440 is a wasteful number, since it uses less digits than its factorization.

920440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23022 (or 23018 counting only the distinct ones).

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

The square root of 920440 is about 959.3956431004. The cubic root of 920440 is about 97.2743851900.

Adding to 920440 its reverse (44029), we get a palindrome (964469).

It can be divided in two parts, 9 and 20440, that added together give a square (20449 = 143²).

The spelling of 920440 in words is "nine hundred twenty thousand, four hundred forty".