1947531968 has 56 divisors (see below), whose sum is σ = 4101797232. Its totient is φ = 914284544.

The previous prime is 1947531967. The next prime is 1947532141. The reversal of 1947531968 is 8691357491.

It is not an unprimeable number, because it can be changed into a prime (1947531967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506180 + ... + 510012.

Almost surely, 2^1947531968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1947531968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2050898616).

1947531968 is an abundant number, since it is smaller than the sum of its proper divisors (2154265264).

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

1947531968 is a wasteful number, since it uses less digits than its factorization.

1947531968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329 (or 4319 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 1947531968 is about 44130.8505243214. The cubic root of 1947531968 is about 1248.8056790815.

The spelling of 1947531968 in words is "one billion, nine hundred forty-seven million, five hundred thirty-one thousand, nine hundred sixty-eight".