9974640 has 160 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 2331648.

The previous prime is 9974611. The next prime is 9974651. The reversal of 9974640 is 464799.

9974640 = 23² + 24² + ... + 310².

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71691 + ... + 71829.

It is an arithmetic number, because the mean of its divisors is an integer number (218736).

Almost surely, 2^9974640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9974640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17498880).

9974640 is an abundant number, since it is smaller than the sum of its proper divisors (25023120).

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

9974640 is a wasteful number, since it uses less digits than its factorization.

9974640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 9974640 is about 3158.2653466737. The cubic root of 9974640 is about 215.2611932867.

The spelling of 9974640 in words is "nine million, nine hundred seventy-four thousand, six hundred forty".