9447731420 has 24 divisors (see below), whose sum is σ = 19910853648. Its totient is φ = 3765641600.

The previous prime is 9447731417. The next prime is 9447731471. The reversal of 9447731420 is 241377449.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834926 + ... + 846165.

It is an arithmetic number, because the mean of its divisors is an integer number (829618902).

Almost surely, 2^9447731420 is an apocalyptic number.

It is an amenable number.

9447731420 is an abundant number, since it is smaller than the sum of its proper divisors (10463122228).

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

9447731420 is a wasteful number, since it uses less digits than its factorization.

9447731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681381 (or 1681379 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 9447731420 is about 97199.4414593006. The cubic root of 9447731420 is about 2114.0204276571.

The spelling of 9447731420 in words is "nine billion, four hundred forty-seven million, seven hundred thirty-one thousand, four hundred twenty".