1620205260 has 48 divisors (see below), whose sum is σ = 4542036576. Its totient is φ = 431534592.

The previous prime is 1620205253. The next prime is 1620205277. The reversal of 1620205260 is 625020261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620205260.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35352 + ... + 67008.

It is an arithmetic number, because the mean of its divisors is an integer number (94625762).

Almost surely, 2^1620205260 is an apocalyptic number.

1620205260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620205260 is an abundant number, since it is smaller than the sum of its proper divisors (2921831316).

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

1620205260 is a wasteful number, since it uses less digits than its factorization.

1620205260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32522 (or 32520 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1620205260 is about 40251.7733770824. The cubic root of 1620205260 is about 1174.5098930788.

The spelling of 1620205260 in words is "one billion, six hundred twenty million, two hundred five thousand, two hundred sixty".