9437828728 has 32 divisors (see below), whose sum is σ = 18306956160. Its totient is φ = 4556643840.

The previous prime is 9437828723. The next prime is 9437828753. The reversal of 9437828728 is 8278287349.

It is a happy number.

It is a super-2 number, since 2×9437828728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9437828723) 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, 71700 + ... + 154972.

It is an arithmetic number, because the mean of its divisors is an integer number (572092380).

Almost surely, 2^9437828728 is an apocalyptic number.

It is an amenable number.

9437828728 is a deficient number, since it is larger than the sum of its proper divisors (8869127432).

9437828728 is a wasteful number, since it uses less digits than its factorization.

9437828728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83767 (or 83763 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The square root of 9437828728 is about 97148.4880376427. The cubic root of 9437828728 is about 2113.2815620427.

The spelling of 9437828728 in words is "nine billion, four hundred thirty-seven million, eight hundred twenty-eight thousand, seven hundred twenty-eight".