947956840 has 16 divisors (see below), whose sum is σ = 2132902980. Its totient is φ = 379182720.

The previous prime is 947956837. The next prime is 947956921. The reversal of 947956840 is 48659749.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 947039076 + 917764 = 30774^2 + 958^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11849421 + ... + 11849500.

Almost surely, 2^947956840 is an apocalyptic number.

It is an amenable number.

947956840 is an abundant number, since it is smaller than the sum of its proper divisors (1184946140).

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

947956840 is a wasteful number, since it uses less digits than its factorization.

947956840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23698932 (or 23698928 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 947956840 is about 30788.9077428869. The cubic root of 947956840 is about 982.3423215764.

The spelling of 947956840 in words is "nine hundred forty-seven million, nine hundred fifty-six thousand, eight hundred forty".