745434240 has 128 divisors (see below), whose sum is σ = 2431598400. Its totient is φ = 194138112.

The previous prime is 745434229. The next prime is 745434251. The reversal of 745434240 is 42434547.

It is an interprime number because it is at equal distance from previous prime (745434229) and next prime (745434251).

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 78046 + ... + 87074.

Almost surely, 2^745434240 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 745434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215799200).

745434240 is an abundant number, since it is smaller than the sum of its proper divisors (1686164160).

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

745434240 is a wasteful number, since it uses less digits than its factorization.

745434240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9094 (or 9082 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 33.

The square root of 745434240 is about 27302.6416304357. The cubic root of 745434240 is about 906.7128676957.

Adding to 745434240 its reverse (42434547), we get a palindrome (787868787).

The spelling of 745434240 in words is "seven hundred forty-five million, four hundred thirty-four thousand, two hundred forty".