618955938 has 16 divisors (see below), whose sum is σ = 1375457760. Its totient is φ = 206318628.

The previous prime is 618955867. The next prime is 618955949. The reversal of 618955938 is 839559816.

It is a happy number.

618955938 is a `hidden beast` number, since 6 + 1 + 89 + 559 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 11462147 = 618955938 / (6 + 1 + 8 + 9 + 5 + 5 + 9 + 3 + 8).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5731020 + ... + 5731127.

It is an arithmetic number, because the mean of its divisors is an integer number (85966110).

Almost surely, 2^618955938 is an apocalyptic number.

618955938 is an abundant number, since it is smaller than the sum of its proper divisors (756501822).

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

618955938 is a wasteful number, since it uses less digits than its factorization.

618955938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462158 (or 11462152 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 618955938 is about 24878.8250928375. The cubic root of 618955938 is about 852.2229876566. Note that the first 3 decimals are identical.

The spelling of 618955938 in words is "six hundred eighteen million, nine hundred fifty-five thousand, nine hundred thirty-eight".