618778788 has 24 divisors (see below), whose sum is σ = 1452167808. Its totient is φ = 205066656.

The previous prime is 618778747. The next prime is 618778793. The reversal of 618778788 is 887877816.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146956 + ... + 151107.

It is an arithmetic number, because the mean of its divisors is an integer number (60506992).

Almost surely, 2^618778788 is an apocalyptic number.

It is an amenable number.

618778788 is an abundant number, since it is smaller than the sum of its proper divisors (833389020).

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

618778788 is a wasteful number, since it uses less digits than its factorization.

618778788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298243 (or 298241 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 60.

The square root of 618778788 is about 24875.2645815075. The cubic root of 618778788 is about 852.1416756179.

The spelling of 618778788 in words is "six hundred eighteen million, seven hundred seventy-eight thousand, seven hundred eighty-eight".