623878 has 8 divisors (see below), whose sum is σ = 955872. Its totient is φ = 305256.

The previous prime is 623869. The next prime is 623879. The reversal of 623878 is 878326.

It is a happy number.

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 (623879) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3225 + ... + 3412.

It is an arithmetic number, because the mean of its divisors is an integer number (119484).

2⁶²³⁸⁷⁸ is an apocalyptic number.

623878 is a deficient number, since it is larger than the sum of its proper divisors (331994).

623878 is a wasteful number, since it uses less digits than its factorization.

623878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6686.

The product of its digits is 16128, while the sum is 34.

The square root of 623878 is about 789.8594811737. The cubic root of 623878 is about 85.4476042073.

The spelling of 623878 in words is "six hundred twenty-three thousand, eight hundred seventy-eight".