1145443640 has 32 divisors (see below), whose sum is σ = 2811544560. Its totient is φ = 416524800.

The previous prime is 1145443577. The next prime is 1145443661. The reversal of 1145443640 is 463445411.

It is a super-2 number, since 2×1145443640² = 2624082264832899200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145443597 and 1145443606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301201 + ... + 1302080.

Almost surely, 2^1145443640 is an apocalyptic number.

1145443640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145443640 is an abundant number, since it is smaller than the sum of its proper divisors (1666100920).

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

1145443640 is a wasteful number, since it uses less digits than its factorization.

1145443640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603303 (or 2603299 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1145443640 is about 33844.4033778112. The cubic root of 1145443640 is about 1046.3040548613.

The spelling of 1145443640 in words is "one billion, one hundred forty-five million, four hundred forty-three thousand, six hundred forty".