9949228728 has 16 divisors (see below), whose sum is σ = 24873071880. Its totient is φ = 3316409568.

The previous prime is 9949228727. The next prime is 9949228739. The reversal of 9949228728 is 8278229499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9949228727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207275575 + ... + 207275622.

Almost surely, 2^9949228728 is an apocalyptic number.

It is an amenable number.

9949228728 is an abundant number, since it is smaller than the sum of its proper divisors (14923843152).

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

9949228728 is a wasteful number, since it uses less digits than its factorization.

9949228728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414551206 (or 414551202 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 9949228728 is about 99745.8206041737. The cubic root of 9949228728 is about 2150.7823889862.

The spelling of 9949228728 in words is "nine billion, nine hundred forty-nine million, two hundred twenty-eight thousand, seven hundred twenty-eight".