947222640 has 640 divisors, whose sum is σ = 4133068800. Its totient is φ = 194088960.

The previous prime is 947222629. The next prime is 947222663. The reversal of 947222640 is 46222749.

947222640 is a `hidden beast` number, since 9 + 4 + 7 + 2 + 2 + 2 + 640 = 666.

947222640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 947222595 and 947222604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11990121 + ... + 11990199.

It is an arithmetic number, because the mean of its divisors is an integer number (6457920).

Almost surely, 2^947222640 is an apocalyptic number.

947222640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 947222640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2066534400).

947222640 is an abundant number, since it is smaller than the sum of its proper divisors (3185846160).

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

947222640 is a wasteful number, since it uses less digits than its factorization.

947222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 947222640 is about 30776.9823082121. The cubic root of 947222640 is about 982.0886454655.

The spelling of 947222640 in words is "nine hundred forty-seven million, two hundred twenty-two thousand, six hundred forty".