618821382 has 16 divisors (see below), whose sum is σ = 1258620480. Its totient is φ = 202777512.

The previous prime is 618821353. The next prime is 618821383. The reversal of 618821382 is 283128816.

It is a self number, because there is not a number n which added to its sum of digits gives 618821382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618821383) 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, 873688 + ... + 874395.

It is an arithmetic number, because the mean of its divisors is an integer number (78663780).

Almost surely, 2^618821382 is an apocalyptic number.

618821382 is an abundant number, since it is smaller than the sum of its proper divisors (639799098).

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

618821382 is a wasteful number, since it uses less digits than its factorization.

618821382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748147.

The product of its digits is 36864, while the sum is 39.

The square root of 618821382 is about 24876.1207184722. The cubic root of 618821382 is about 852.1612277262.

The spelling of 618821382 in words is "six hundred eighteen million, eight hundred twenty-one thousand, three hundred eighty-two".