618520 has 48 divisors (see below), whose sum is σ = 1625040. Its totient is φ = 207552.

The previous prime is 618509. The next prime is 618521. The reversal of 618520 is 25816.

618520 = T₄₄ + T₄₅ + ... + T₁₅₅.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 618491 and 618500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618521) 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 11 ways as a sum of consecutive naturals, for example, 13137 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (33855).

2⁶¹⁸⁵²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812520).

618520 is an abundant number, since it is smaller than the sum of its proper divisors (1006520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618520 is a wasteful number, since it uses less digits than its factorization.

618520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 618520 is about 786.4604249420. The cubic root of 618520 is about 85.2022863751.

Subtracting from 618520 its reverse (25816), we obtain a cube (592704 = 84³).

The spelling of 618520 in words is "six hundred eighteen thousand, five hundred twenty".