1161464728 has 16 divisors (see below), whose sum is σ = 2230862760. Its totient is φ = 566568000.

The previous prime is 1161464719. The next prime is 1161464747. The reversal of 1161464728 is 8274641611.

It is a super-2 number, since 2×1161464728² = 2698000628776227968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770198 + ... + 1770853.

Almost surely, 2^1161464728 is an apocalyptic number.

It is an amenable number.

1161464728 is a deficient number, since it is larger than the sum of its proper divisors (1069398032).

1161464728 is a wasteful number, since it uses less digits than its factorization.

1161464728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541098 (or 3541094 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 1161464728 is about 34080.2688956528. The cubic root of 1161464728 is about 1051.1596343077.

The spelling of 1161464728 in words is "one billion, one hundred sixty-one million, four hundred sixty-four thousand, seven hundred twenty-eight".