655480 has 32 divisors (see below), whose sum is σ = 1686240. Its totient is φ = 224640.

The previous prime is 655471. The next prime is 655489. The reversal of 655480 is 84556.

655480 = 303² + 304² + ... + 309².

It is an interprime number because it is at equal distance from previous prime (655471) and next prime (655489).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655489) by changing a digit.

655480 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 7 ways as a sum of consecutive naturals, for example, 891 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (52695).

655480 is a Friedman number, since it can be written as (8^5+6)*5*(4+0), using all its digits and the basic arithmetic operations.

2⁶⁵⁵⁴⁸⁰ is an apocalyptic number.

It is an amenable number.

655480 is an abundant number, since it is smaller than the sum of its proper divisors (1030760).

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

655480 is a wasteful number, since it uses less digits than its factorization.

655480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 655480 is about 809.6171934933. The cubic root of 655480 is about 86.8666650044.

The spelling of 655480 in words is "six hundred fifty-five thousand, four hundred eighty".