9649728 has 84 divisors (see below), whose sum is σ = 30193488. Its totient is φ = 2922240.

The previous prime is 9649669. The next prime is 9649729. The reversal of 9649728 is 8279469.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9649729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5575 + ... + 7097.

Almost surely, 2^9649728 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 9649728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15096744).

9649728 is an abundant number, since it is smaller than the sum of its proper divisors (20543760).

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

9649728 is a wasteful number, since it uses less digits than its factorization.

9649728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1539 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 9649728 is about 3106.4011331443. The cubic root of 9649728 is about 212.8980534423.

The spelling of 9649728 in words is "nine million, six hundred forty-nine thousand, seven hundred twenty-eight".