947881928 has 32 divisors (see below), whose sum is σ = 2064480960. Its totient is φ = 399574080.

The previous prime is 947881927. The next prime is 947881931. The reversal of 947881928 is 829188749.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (947881927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135326 + ... + 142157.

It is an arithmetic number, because the mean of its divisors is an integer number (64515030).

Almost surely, 2^947881928 is an apocalyptic number.

It is an amenable number.

947881928 is an abundant number, since it is smaller than the sum of its proper divisors (1116599032).

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

947881928 is a wasteful number, since it uses less digits than its factorization.

947881928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277557 (or 277553 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 56.

The square root of 947881928 is about 30787.6911768323. The cubic root of 947881928 is about 982.3164444607.

The spelling of 947881928 in words is "nine hundred forty-seven million, eight hundred eighty-one thousand, nine hundred twenty-eight".