1620053316 has 144 divisors (see below), whose sum is σ = 4990003200. Its totient is φ = 432858816.

The previous prime is 1620053291. The next prime is 1620053317. The reversal of 1620053316 is 6133500261.

1620053316 is a `hidden beast` number, since 1 + 620 + 0 + 5 + 3 + 31 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1620053316.

It is not an unprimeable number, because it can be changed into a prime (1620053317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376111 + ... + 380393.

It is an arithmetic number, because the mean of its divisors is an integer number (34652800).

Almost surely, 2^1620053316 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 1620053316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495001600).

1620053316 is an abundant number, since it is smaller than the sum of its proper divisors (3369949884).

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

1620053316 is a wasteful number, since it uses less digits than its factorization.

1620053316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398 (or 4393 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1620053316 is about 40249.8859128818. The cubic root of 1620053316 is about 1174.4731764737.

Adding to 1620053316 its reverse (6133500261), we get a palindrome (7753553577).

The spelling of 1620053316 in words is "one billion, six hundred twenty million, fifty-three thousand, three hundred sixteen".