618493788 has 72 divisors (see below), whose sum is σ = 1764388080. Its totient is φ = 180956160.

The previous prime is 618493787. The next prime is 618493789. The reversal of 618493788 is 887394816.

It is an interprime number because it is at equal distance from previous prime (618493787) and next prime (618493789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618493781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15445 + ... + 38412.

It is an arithmetic number, because the mean of its divisors is an integer number (24505390).

Almost surely, 2^618493788 is an apocalyptic number.

It is an amenable number.

618493788 is an abundant number, since it is smaller than the sum of its proper divisors (1145894292).

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

618493788 is a wasteful number, since it uses less digits than its factorization.

618493788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53907 (or 53902 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 618493788 is about 24869.5353394469. The cubic root of 618493788 is about 852.0108277405.

The spelling of 618493788 in words is "six hundred eighteen million, four hundred ninety-three thousand, seven hundred eighty-eight".