655390 has 8 divisors (see below), whose sum is σ = 1179720. Its totient is φ = 262152.

The previous prime is 655387. The next prime is 655399. The reversal of 655390 is 93556.

It is a happy number.

655390 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655399) 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, 32760 + ... + 32779.

It is an arithmetic number, because the mean of its divisors is an integer number (147465).

2⁶⁵⁵³⁹⁰ is an apocalyptic number.

655390 is a deficient number, since it is larger than the sum of its proper divisors (524330).

655390 is a wasteful number, since it uses less digits than its factorization.

655390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65546.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 655390 is about 809.5616097617. The cubic root of 655390 is about 86.8626891100.

The spelling of 655390 in words is "six hundred fifty-five thousand, three hundred ninety".