9979240 has 32 divisors (see below), whose sum is σ = 23431680. Its totient is φ = 3817792.

The previous prime is 9979213. The next prime is 9979243. The reversal of 9979240 is 429799.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 9979193 and 9979202.

It is not an unprimeable number, because it can be changed into a prime (9979243) 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, 4504 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (732240).

Almost surely, 2^9979240 is an apocalyptic number.

It is an amenable number.

9979240 is an abundant number, since it is smaller than the sum of its proper divisors (13452440).

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

9979240 is a wasteful number, since it uses less digits than its factorization.

9979240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10881 (or 10877 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 9979240 is about 3158.9935105980. The cubic root of 9979240 is about 215.2942788354.

The spelling of 9979240 in words is "nine million, nine hundred seventy-nine thousand, two hundred forty".