9421942640 has 320 divisors, whose sum is σ = 26728289280. Its totient is φ = 3046686720.

The previous prime is 9421942633. The next prime is 9421942679. The reversal of 9421942640 is 462491249.

It is a super-2 number, since 2×9421942640² (a number of 21 digits) 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 63 ways as a sum of consecutive naturals, for example, 47827022 + ... + 47827218.

It is an arithmetic number, because the mean of its divisors is an integer number (83525904).

Almost surely, 2^9421942640 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 9421942640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13364144640).

9421942640 is an abundant number, since it is smaller than the sum of its proper divisors (17306346640).

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

9421942640 is a wasteful number, since it uses less digits than its factorization.

9421942640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 9421942640 is about 97066.6917124510. The cubic root of 9421942640 is about 2112.0951793175.

The spelling of 9421942640 in words is "nine billion, four hundred twenty-one million, nine hundred forty-two thousand, six hundred forty".