655438 has 8 divisors (see below), whose sum is σ = 1123632. Its totient is φ = 280896.

The previous prime is 655399. The next prime is 655439. The reversal of 655438 is 834556.

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 (655439) by changing a digit.

655438 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 3 ways as a sum of consecutive naturals, for example, 23395 + ... + 23422.

It is an arithmetic number, because the mean of its divisors is an integer number (140454).

2⁶⁵⁵⁴³⁸ is an apocalyptic number.

655438 is a deficient number, since it is larger than the sum of its proper divisors (468194).

655438 is a wasteful number, since it uses less digits than its factorization.

655438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46826.

The product of its digits is 14400, while the sum is 31.

The square root of 655438 is about 809.5912548935. The cubic root of 655438 is about 86.8648096323.

The spelling of 655438 in words is "six hundred fifty-five thousand, four hundred thirty-eight".