618399628 has 24 divisors (see below), whose sum is σ = 1349236224. Its totient is φ = 240934800.

The previous prime is 618399623. The next prime is 618399637. The reversal of 618399628 is 826993816.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (618399623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003588 + ... + 1004203.

It is an arithmetic number, because the mean of its divisors is an integer number (56218176).

Almost surely, 2^618399628 is an apocalyptic number.

It is an amenable number.

618399628 is an abundant number, since it is smaller than the sum of its proper divisors (730836596).

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

618399628 is a wasteful number, since it uses less digits than its factorization.

618399628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007813 (or 2007811 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 618399628 is about 24867.6421881931. The cubic root of 618399628 is about 851.9675886044.

The spelling of 618399628 in words is "six hundred eighteen million, three hundred ninety-nine thousand, six hundred twenty-eight".