920660 has 24 divisors (see below), whose sum is σ = 2082696. Its totient is φ = 339840.

The previous prime is 920653. The next prime is 920677. The reversal of 920660 is 66029.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 913936 = 82^2 + 956^2 .

It is a super-2 number, since 2×920660² = 1695229671200, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920660.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511 + ... + 2030.

It is an arithmetic number, because the mean of its divisors is an integer number (86779).

2⁹²⁰⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

920660 is an abundant number, since it is smaller than the sum of its proper divisors (1162036).

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

920660 is a wasteful number, since it uses less digits than its factorization.

920660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563 (or 3561 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 920660 is about 959.5102917635. The cubic root of 920660 is about 97.2821346214.

Adding to 920660 its reverse (66029), we get a palindrome (986689).

The spelling of 920660 in words is "nine hundred twenty thousand, six hundred sixty".