618871540 has 48 divisors (see below), whose sum is σ = 1488219264. Its totient is φ = 211766400.

The previous prime is 618871531. The next prime is 618871601. The reversal of 618871540 is 45178816.

It is a junction number, because it is equal to n+sod(n) for n = 618871493 and 618871502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71655 + ... + 79825.

It is an arithmetic number, because the mean of its divisors is an integer number (31004568).

Almost surely, 2^618871540 is an apocalyptic number.

It is an amenable number.

618871540 is an abundant number, since it is smaller than the sum of its proper divisors (869347724).

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

618871540 is a wasteful number, since it uses less digits than its factorization.

618871540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8728 (or 8726 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 618871540 is about 24877.1288536278. The cubic root of 618871540 is about 852.1842508200.

The spelling of 618871540 in words is "six hundred eighteen million, eight hundred seventy-one thousand, five hundred forty".