1620849260 has 48 divisors (see below), whose sum is σ = 3566115840. Its totient is φ = 618045120.

The previous prime is 1620849257. The next prime is 1620849271. The reversal of 1620849260 is 629480261.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22031 + ... + 61049.

It is an arithmetic number, because the mean of its divisors is an integer number (74294080).

Almost surely, 2^1620849260 is an apocalyptic number.

1620849260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620849260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783057920).

1620849260 is an abundant number, since it is smaller than the sum of its proper divisors (1945266580).

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

1620849260 is a wasteful number, since it uses less digits than its factorization.

1620849260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39126 (or 39124 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1620849260 is about 40259.7722298574. The cubic root of 1620849260 is about 1174.6654873927.

The spelling of 1620849260 in words is "one billion, six hundred twenty million, eight hundred forty-nine thousand, two hundred sixty".