655490 has 32 divisors (see below), whose sum is σ = 1321920. Its totient is φ = 232000.

The previous prime is 655489. The next prime is 655507. The reversal of 655490 is 94556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6440 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2⁶⁵⁵⁴⁹⁰ is an apocalyptic number.

655490 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

655490 is a wasteful number, since it uses less digits than its factorization.

655490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 655490 is about 809.6233692279. The cubic root of 655490 is about 86.8671067480.

It can be divided in two parts, 65 and 5490, that added together give a palindrome (5555).

The spelling of 655490 in words is "six hundred fifty-five thousand, four hundred ninety".