623455 has 16 divisors (see below), whose sum is σ = 875520.
Its totient is φ = 417312.
The previous prime is 623437. The next prime is 623477. The reversal of 623455 is 554326.
It is not a de Polignac number, because 623455 - 25 = 623423 is a prime.
It is a super-2 number, since 2×6234552 = 777392274050, which contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456 + ... + 1834.
It is an arithmetic number, because the mean of its divisors is an integer number (54720).
2623455 is an apocalyptic number.
623455 is a deficient number, since it is larger than the sum of its proper divisors (252065).
623455 is a wasteful number, since it uses less digits than its factorization.
623455 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 438.
The product of its digits is 3600, while the sum is 25.
The square root of 623455 is about 789.5916666227.
The cubic root of 623455 is about 85.4282881933.
The spelling of 623455 in words is "six hundred twenty-three thousand, four hundred fifty-five".