1905488720 has 80 divisors (see below), whose sum is σ = 4740113280. Its totient is φ = 710208000.

The previous prime is 1905488693. The next prime is 1905488731. The reversal of 1905488720 is 278845091.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 82445 + ... + 102995.

It is an arithmetic number, because the mean of its divisors is an integer number (59251416).

Almost surely, 2^1905488720 is an apocalyptic number.

1905488720 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 1905488720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370056640).

1905488720 is an abundant number, since it is smaller than the sum of its proper divisors (2834624560).

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

1905488720 is a wasteful number, since it uses less digits than its factorization.

1905488720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644 (or 20638 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1905488720 is about 43651.9039676393. The cubic root of 1905488720 is about 1239.7538359771.

The spelling of 1905488720 in words is "one billion, nine hundred five million, four hundred eighty-eight thousand, seven hundred twenty".