618540 has 72 divisors (see below), whose sum is σ = 1906128. Its totient is φ = 149760.

The previous prime is 618521. The next prime is 618547. The reversal of 618540 is 45816.

618540 = T₂₀₅ + T₂₀₆ + ... + T₂₃₀.

It is a self number, because there is not a number n which added to its sum of digits gives 618540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10110 + ... + 10170.

It is an arithmetic number, because the mean of its divisors is an integer number (26474).

2⁶¹⁸⁵⁴⁰ is an apocalyptic number.

618540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953064).

618540 is an abundant number, since it is smaller than the sum of its proper divisors (1287588).

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

618540 is a wasteful number, since it uses less digits than its factorization.

618540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 618540 is about 786.4731400372. The cubic root of 618540 is about 85.2032047109.

The spelling of 618540 in words is "six hundred eighteen thousand, five hundred forty".