658940 has 24 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 257600.

The previous prime is 658919. The next prime is 658943. The reversal of 658940 is 49856.

It is a junction number, because it is equal to n+sod(n) for n = 658897 and 658906.

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 658940.

It is not an unprimeable number, because it can be changed into a prime (658943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁶⁵⁸⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

658940 is an abundant number, since it is smaller than the sum of its proper divisors (756292).

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

658940 is a wasteful number, since it uses less digits than its factorization.

658940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 658940 is about 811.7511934084. The cubic root of 658940 is about 87.0192409111.

The spelling of 658940 in words is "six hundred fifty-eight thousand, nine hundred forty".