1145005728 has 48 divisors (see below), whose sum is σ = 3069601920. Its totient is φ = 373546496.

The previous prime is 1145005727. The next prime is 1145005747. The reversal of 1145005728 is 8275005411.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1145005728² = 2622076234305619968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145005723) 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, 122373 + ... + 131396.

It is an arithmetic number, because the mean of its divisors is an integer number (63950040).

Almost surely, 2^1145005728 is an apocalyptic number.

It is an amenable number.

1145005728 is an abundant number, since it is smaller than the sum of its proper divisors (1924596192).

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

1145005728 is a wasteful number, since it uses less digits than its factorization.

1145005728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253829 (or 253821 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1145005728 is about 33837.9332702220. The cubic root of 1145005728 is about 1046.1707011436.

The spelling of 1145005728 in words is "one billion, one hundred forty-five million, five thousand, seven hundred twenty-eight".