618638772 has 24 divisors (see below), whose sum is σ = 1528402176. Its totient is φ = 194082688.

The previous prime is 618638771. The next prime is 618638851. The reversal of 618638772 is 277836816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618638771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1516068 + ... + 1516475.

It is an arithmetic number, because the mean of its divisors is an integer number (63683424).

Almost surely, 2^618638772 is an apocalyptic number.

It is an amenable number.

618638772 is an abundant number, since it is smaller than the sum of its proper divisors (909763404).

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

618638772 is a wasteful number, since it uses less digits than its factorization.

618638772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032567 (or 3032565 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 618638772 is about 24872.4500602574. The cubic root of 618638772 is about 852.0773971436.

The spelling of 618638772 in words is "six hundred eighteen million, six hundred thirty-eight thousand, seven hundred seventy-two".