618622388 has 12 divisors (see below), whose sum is σ = 1111848612. Its totient is φ = 300951360.

The previous prime is 618622373. The next prime is 618622397. The reversal of 618622388 is 883226816.

It can be written as a sum of positive squares in 2 ways, for example, as 464316304 + 154306084 = 21548^2 + 12422^2 .

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, 2089793 + ... + 2090088.

It is an arithmetic number, because the mean of its divisors is an integer number (92654051).

Almost surely, 2^618622388 is an apocalyptic number.

It is an amenable number.

618622388 is a deficient number, since it is larger than the sum of its proper divisors (493226224).

618622388 is a wasteful number, since it uses less digits than its factorization.

618622388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179922 (or 4179920 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 618622388 is about 24872.1206976808. The cubic root of 618622388 is about 852.0698749513.

The spelling of 618622388 in words is "six hundred eighteen million, six hundred twenty-two thousand, three hundred eighty-eight".