745507072 has 36 divisors (see below), whose sum is σ = 1491566076. Its totient is φ = 371886080.

The previous prime is 745507051. The next prime is 745507097. The reversal of 745507072 is 270705547.

It can be written as a sum of positive squares in 2 ways, for example, as 318836736 + 426670336 = 17856^2 + 20656^2 .

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, 114858 + ... + 121174.

It is an arithmetic number, because the mean of its divisors is an integer number (41432391).

Almost surely, 2^745507072 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 745507072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745783038).

745507072 is an abundant number, since it is smaller than the sum of its proper divisors (746059004).

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

745507072 is an equidigital number, since it uses as much as digits as its factorization.

745507072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6794 (or 6780 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 745507072 is about 27303.9753882104. The cubic root of 745507072 is about 906.7423965964.

The spelling of 745507072 in words is "seven hundred forty-five million, five hundred seven thousand, seventy-two".