653980 has 24 divisors (see below), whose sum is σ = 1446480. Its totient is φ = 247680.

The previous prime is 653977. The next prime is 653993. The reversal of 653980 is 89356.

It is a congruent number.

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, 481 + ... + 1240.

It is an arithmetic number, because the mean of its divisors is an integer number (60270).

2⁶⁵³⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

653980 is an abundant number, since it is smaller than the sum of its proper divisors (792500).

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

653980 is a wasteful number, since it uses less digits than its factorization.

653980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 653980 is about 808.6902991875. The cubic root of 653980 is about 86.8003525225.

The spelling of 653980 in words is "six hundred fifty-three thousand, nine hundred eighty".