618534 has 24 divisors (see below), whose sum is σ = 1531920. Its totient is φ = 176688.

The previous prime is 618521. The next prime is 618547. The reversal of 618534 is 435816.

It is an interprime number because it is at equal distance from previous prime (618521) and next prime (618547).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 618498 and 618507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2329 + ... + 2580.

It is an arithmetic number, because the mean of its divisors is an integer number (63830).

2⁶¹⁸⁵³⁴ is an apocalyptic number.

618534 is an abundant number, since it is smaller than the sum of its proper divisors (913386).

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

618534 is a wasteful number, since it uses less digits than its factorization.

618534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924 (or 4921 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 618534 is about 786.4693255302. The cubic root of 618534 is about 85.2029292123.

The spelling of 618534 in words is "six hundred eighteen thousand, five hundred thirty-four".