618793040 has 20 divisors (see below), whose sum is σ = 1438694004. Its totient is φ = 247517184.

The previous prime is 618793031. The next prime is 618793057. The reversal of 618793040 is 40397816.

It can be written as a sum of positive squares in 2 ways, for example, as 370793536 + 247999504 = 19256^2 + 15748^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 618792985 and 618793003.

It is a congruent number.

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, 3867377 + ... + 3867536.

Almost surely, 2^618793040 is an apocalyptic number.

It is an amenable number.

618793040 is an abundant number, since it is smaller than the sum of its proper divisors (819900964).

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

618793040 is a wasteful number, since it uses less digits than its factorization.

618793040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734926 (or 7734920 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 618793040 is about 24875.5510491728. The cubic root of 618793040 is about 852.1482178751.

The spelling of 618793040 in words is "six hundred eighteen million, seven hundred ninety-three thousand, forty".