1900505220 has 48 divisors (see below), whose sum is σ = 5493078528. Its totient is φ = 490452480.

The previous prime is 1900505219. The next prime is 1900505263. The reversal of 1900505220 is 225050091.

It is a super-2 number, since 2×1900505220² = 7223840182494496800, which contains 22 as substring.

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, 509029 + ... + 512748.

It is an arithmetic number, because the mean of its divisors is an integer number (114439136).

Almost surely, 2^1900505220 is an apocalyptic number.

1900505220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1900505220 is an abundant number, since it is smaller than the sum of its proper divisors (3592573308).

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

1900505220 is a wasteful number, since it uses less digits than its factorization.

1900505220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021820 (or 1021818 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1900505220 is about 43594.7843210630. The cubic root of 1900505220 is about 1238.6720999820.

The spelling of 1900505220 in words is "one billion, nine hundred million, five hundred five thousand, two hundred twenty".