618990948 has 72 divisors (see below), whose sum is σ = 1605895200. Its totient is φ = 200960256.

The previous prime is 618990943. The next prime is 618990959. The reversal of 618990948 is 849099816.

It is a junction number, because it is equal to n+sod(n) for n = 618990894 and 618990903.

It is not an unprimeable number, because it can be changed into a prime (618990943) 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 23 ways as a sum of consecutive naturals, for example, 238723 + ... + 241301.

It is an arithmetic number, because the mean of its divisors is an integer number (22304100).

Almost surely, 2^618990948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618990948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802947600).

618990948 is an abundant number, since it is smaller than the sum of its proper divisors (986904252).

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

618990948 is a wasteful number, since it uses less digits than its factorization.

618990948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 618990948 is about 24879.5286932852. The cubic root of 618990948 is about 852.2390554478.

The spelling of 618990948 in words is "six hundred eighteen million, nine hundred ninety thousand, nine hundred forty-eight".