653740 has 12 divisors (see below), whose sum is σ = 1372896. Its totient is φ = 261488.

The previous prime is 653713. The next prime is 653743. The reversal of 653740 is 47356.

It is not an unprimeable number, because it can be changed into a prime (653743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16324 + ... + 16363.

It is an arithmetic number, because the mean of its divisors is an integer number (114408).

2⁶⁵³⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

653740 is an abundant number, since it is smaller than the sum of its proper divisors (719156).

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

653740 is a wasteful number, since it uses less digits than its factorization.

653740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32696 (or 32694 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 653740 is about 808.5418974920. The cubic root of 653740 is about 86.7897331185.

The spelling of 653740 in words is "six hundred fifty-three thousand, seven hundred forty".