745720452 has 96 divisors (see below), whose sum is σ = 1974752640. Its totient is φ = 243302400.

The previous prime is 745720447. The next prime is 745720501. The reversal of 745720452 is 254027547.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1859452 + ... + 1859852.

It is an arithmetic number, because the mean of its divisors is an integer number (20570340).

Almost surely, 2^745720452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745720452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987376320).

745720452 is an abundant number, since it is smaller than the sum of its proper divisors (1229032188).

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

745720452 is a wasteful number, since it uses less digits than its factorization.

745720452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 745720452 is about 27307.8825982536. The cubic root of 745720452 is about 906.8288980052.

Adding to 745720452 its reverse (254027547), we get a palindrome (999747999).

The spelling of 745720452 in words is "seven hundred forty-five million, seven hundred twenty thousand, four hundred fifty-two".