9920312 has 8 divisors (see below), whose sum is σ = 18600600. Its totient is φ = 4960152.

The previous prime is 9920311. The next prime is 9920347. The reversal of 9920312 is 2130299.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620012 + ... + 620027.

It is an arithmetic number, because the mean of its divisors is an integer number (2325075).

Almost surely, 2^9920312 is an apocalyptic number.

It is an amenable number.

9920312 is a deficient number, since it is larger than the sum of its proper divisors (8680288).

9920312 is a wasteful number, since it uses less digits than its factorization.

9920312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240045 (or 1240041 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 9920312 is about 3149.6526792648. The cubic root of 9920312 is about 214.8696668164.

The spelling of 9920312 in words is "nine million, nine hundred twenty thousand, three hundred twelve".