745643020 has 24 divisors (see below), whose sum is σ = 1567939968. Its totient is φ = 297859200.

The previous prime is 745643009. The next prime is 745643021. The reversal of 745643020 is 20346547.

It is not an unprimeable number, because it can be changed into a prime (745643021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9276 + ... + 39715.

It is an arithmetic number, because the mean of its divisors is an integer number (65330832).

Almost surely, 2^745643020 is an apocalyptic number.

It is an amenable number.

745643020 is an abundant number, since it is smaller than the sum of its proper divisors (822296948).

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

745643020 is a wasteful number, since it uses less digits than its factorization.

745643020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49761 (or 49759 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 745643020 is about 27306.4648023138. The cubic root of 745643020 is about 906.7975100119.

Adding to 745643020 its reverse (20346547), we get a palindrome (765989567).

The spelling of 745643020 in words is "seven hundred forty-five million, six hundred forty-three thousand, twenty".