623378 has 12 divisors (see below), whose sum is σ = 1087902. Its totient is φ = 267120.

The previous prime is 623353. The next prime is 623383. The reversal of 623378 is 873326.

It can be written as a sum of positive squares in only one way, i.e., 582169 + 41209 = 763^2 + 203^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 623378.

It is an unprimeable number.

623378 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3083 + ... + 3278.

2⁶²³³⁷⁸ is an apocalyptic number.

623378 is a deficient number, since it is larger than the sum of its proper divisors (464524).

623378 is a wasteful number, since it uses less digits than its factorization.

623378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377 (or 6370 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 623378 is about 789.5429057372. The cubic root of 623378 is about 85.4247710996.

It can be divided in two parts, 623 and 378, that added together give a palindrome (1001).

The spelling of 623378 in words is "six hundred twenty-three thousand, three hundred seventy-eight".