1145720640 has 56 divisors (see below), whose sum is σ = 3637666080. Its totient is φ = 305525248.

The previous prime is 1145720621. The next prime is 1145720659. The reversal of 1145720640 is 460275411.

It is an interprime number because it is at equal distance from previous prime (1145720621) and next prime (1145720659).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1145720598 and 1145720607.

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, 595770 + ... + 597689.

Almost surely, 2^1145720640 is an apocalyptic number.

1145720640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145720640 is an abundant number, since it is smaller than the sum of its proper divisors (2491945440).

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

1145720640 is a wasteful number, since it uses less digits than its factorization.

1145720640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193479 (or 1193469 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1145720640 is about 33848.4953875353. The cubic root of 1145720640 is about 1046.3883898309.

The spelling of 1145720640 in words is "one billion, one hundred forty-five million, seven hundred twenty thousand, six hundred forty".