9931424 has 12 divisors (see below), whose sum is σ = 19552554. Its totient is φ = 4965696.

The previous prime is 9931399. The next prime is 9931447. The reversal of 9931424 is 4241399.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 71824 = 3140^2 + 268^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 310357 = 9931424 / (9 + 9 + 3 + 1 + 4 + 2 + 4).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155147 + ... + 155210.

Almost surely, 2^9931424 is an apocalyptic number.

It is an amenable number.

9931424 is a deficient number, since it is larger than the sum of its proper divisors (9621130).

9931424 is a wasteful number, since it uses less digits than its factorization.

9931424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310367 (or 310359 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 9931424 is about 3151.4161895884. The cubic root of 9931424 is about 214.9498639181.

The spelling of 9931424 in words is "nine million, nine hundred thirty-one thousand, four hundred twenty-four".