9920407 has 8 divisors (see below), whose sum is σ = 11728800. Its totient is φ = 8209824.

The previous prime is 9920399. The next prime is 9920411. The reversal of 9920407 is 7040299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9920407 - 2³ = 9920399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24232 + ... + 24637.

It is an arithmetic number, because the mean of its divisors is an integer number (1466100).

Almost surely, 2^9920407 is an apocalyptic number.

9920407 is a deficient number, since it is larger than the sum of its proper divisors (1808393).

9920407 is a wasteful number, since it uses less digits than its factorization.

9920407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48905.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 9920407 is about 3149.6677602566. The cubic root of 9920407 is about 214.8703527005.

The spelling of 9920407 in words is "nine million, nine hundred twenty thousand, four hundred seven".