745497940 has 72 divisors (see below), whose sum is σ = 1822130856. Its totient is φ = 255129600.

The previous prime is 745497937. The next prime is 745497989. The reversal of 745497940 is 49794547.

It can be written as a sum of positive squares in 4 ways, for example, as 108743184 + 636754756 = 10428^2 + 25234^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32080 + ... + 50200.

It is an arithmetic number, because the mean of its divisors is an integer number (25307373).

Almost surely, 2^745497940 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 745497940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911065428).

745497940 is an abundant number, since it is smaller than the sum of its proper divisors (1076632916).

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

745497940 is a wasteful number, since it uses less digits than its factorization.

745497940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18169 (or 18156 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 745497940 is about 27303.8081593026. The cubic root of 745497940 is about 906.7386942370.

The spelling of 745497940 in words is "seven hundred forty-five million, four hundred ninety-seven thousand, nine hundred forty".