947439988 has 24 divisors (see below), whose sum is σ = 1915147584. Its totient is φ = 405321600.

The previous prime is 947439979. The next prime is 947440001. The reversal of 947439988 is 889934749.

947439988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×947439988² = 1795285061722880288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632568 + ... + 634063.

It is an arithmetic number, because the mean of its divisors is an integer number (79797816).

Almost surely, 2^947439988 is an apocalyptic number.

It is an amenable number.

947439988 is an abundant number, since it is smaller than the sum of its proper divisors (967707596).

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

947439988 is a wasteful number, since it uses less digits than its factorization.

947439988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266663 (or 1266661 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The square root of 947439988 is about 30780.5131211291. The cubic root of 947439988 is about 982.1637558178.

The spelling of 947439988 in words is "nine hundred forty-seven million, four hundred thirty-nine thousand, nine hundred eighty-eight".