1009481728 has 24 divisors (see below), whose sum is σ = 2018474640. Its totient is φ = 504739840.

The previous prime is 1009481719. The next prime is 1009481729. The reversal of 1009481728 is 8271849001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009481729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244408 + ... + 248503.

It is an arithmetic number, because the mean of its divisors is an integer number (84103110).

Almost surely, 2^1009481728 is an apocalyptic number.

It is an amenable number.

1009481728 is a deficient number, since it is larger than the sum of its proper divisors (1008992912).

1009481728 is an frugal number, since it uses more digits than its factorization.

1009481728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492933 (or 492913 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1009481728 is about 31772.3421862475. The cubic root of 1009481728 is about 1003.1506390486.

The spelling of 1009481728 in words is "one billion, nine million, four hundred eighty-one thousand, seven hundred twenty-eight".