618885040 has 20 divisors (see below), whose sum is σ = 1438907904. Its totient is φ = 247553984.

The previous prime is 618885031. The next prime is 618885053. The reversal of 618885040 is 40588816.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 618884984 and 618885002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3867952 + ... + 3868111.

Almost surely, 2^618885040 is an apocalyptic number.

It is an amenable number.

618885040 is an abundant number, since it is smaller than the sum of its proper divisors (820022864).

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

618885040 is a wasteful number, since it uses less digits than its factorization.

618885040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736076 (or 7736070 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 618885040 is about 24877.4001857107. The cubic root of 618885040 is about 852.1904472614.

The spelling of 618885040 in words is "six hundred eighteen million, eight hundred eighty-five thousand, forty".