9724990 has 32 divisors (see below), whose sum is σ = 19232640.
Its totient is φ = 3511200.
The previous prime is 9724961. The next prime is 9724993. The reversal of 9724990 is 994279.
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9724993) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23001 + ... + 23419.
It is an arithmetic number, because the mean of its divisors is an integer number (601020).
Almost surely, 29724990 is an apocalyptic number.
9724990 is a deficient number, since it is larger than the sum of its proper divisors (9507650).
9724990 is a wasteful number, since it uses less digits than its factorization.
9724990 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 648.
The product of its (nonzero) digits is 40824, while the sum is 40.
The square root of 9724990 is about 3118.4916225637.
The cubic root of 9724990 is about 213.4501123871.
The spelling of 9724990 in words is "nine million, seven hundred twenty-four thousand, nine hundred ninety".