947867640 has 128 divisors (see below), whose sum is σ = 3025512000. Its totient is φ = 236740608.

The previous prime is 947867633. The next prime is 947867663. The reversal of 947867640 is 46768749.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466146 + ... + 468174.

Almost surely, 2^947867640 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 947867640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512756000).

947867640 is an abundant number, since it is smaller than the sum of its proper divisors (2077644360).

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

947867640 is a wasteful number, since it uses less digits than its factorization.

947867640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 947867640 is about 30787.4591351739. The cubic root of 947867640 is about 982.3115087518.

The spelling of 947867640 in words is "nine hundred forty-seven million, eight hundred sixty-seven thousand, six hundred forty".