947347440 has 320 divisors, whose sum is σ = 3422030976. Its totient is φ = 214695936.

The previous prime is 947347439. The next prime is 947347447. The reversal of 947347440 is 44743749.

It is a junction number, because it is equal to n+sod(n) for n = 947347392 and 947347401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947347447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2810952 + ... + 2811288.

Almost surely, 2^947347440 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 947347440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711015488).

947347440 is an abundant number, since it is smaller than the sum of its proper divisors (2474683536).

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

947347440 is a wasteful number, since it uses less digits than its factorization.

947347440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 947347440 is about 30779.0097306590. The cubic root of 947347440 is about 982.1317748121.

The spelling of 947347440 in words is "nine hundred forty-seven million, three hundred forty-seven thousand, four hundred forty".