618806 has 4 divisors (see below), whose sum is σ = 928212. Its totient is φ = 309402.

The previous prime is 618799. The next prime is 618823. The reversal of 618806 is 608816.

618806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 618806.

It is an unprimeable number.

618806 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 as a sum of consecutive naturals, namely, 154700 + ... + 154703.

It is an arithmetic number, because the mean of its divisors is an integer number (232053).

2⁶¹⁸⁸⁰⁶ is an apocalyptic number.

618806 is a deficient number, since it is larger than the sum of its proper divisors (309406).

618806 is a wasteful number, since it uses less digits than its factorization.

618806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309405.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 618806 is about 786.6422312589. The cubic root of 618806 is about 85.2154166964.

It can be divided in two parts, 61 and 8806, that multiplied together give a triangular number (537166 = T₁₀₃₆).

The spelling of 618806 in words is "six hundred eighteen thousand, eight hundred six".