1947765480 has 128 divisors (see below), whose sum is σ = 6223910400. Its totient is φ = 485937152.

The previous prime is 1947765467. The next prime is 1947765499. The reversal of 1947765480 is 845677491.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 31 ways as a sum of consecutive naturals, for example, 350161 + ... + 355679.

It is an arithmetic number, because the mean of its divisors is an integer number (48624300).

Almost surely, 2^1947765480 is an apocalyptic number.

1947765480 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 1947765480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3111955200).

1947765480 is an abundant number, since it is smaller than the sum of its proper divisors (4276144920).

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

1947765480 is a wasteful number, since it uses less digits than its factorization.

1947765480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723 (or 5719 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 1947765480 is about 44133.4961225598. The cubic root of 1947765480 is about 1248.8555883106.

The spelling of 1947765480 in words is "one billion, nine hundred forty-seven million, seven hundred sixty-five thousand, four hundred eighty".