745220432 has 80 divisors (see below), whose sum is σ = 1755691200. Its totient is φ = 302008320.

The previous prime is 745220429. The next prime is 745220479. The reversal of 745220432 is 234022547.

It is a junction number, because it is equal to n+sod(n) for n = 745220395 and 745220404.

It is a congruent number.

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, 50294 + ... + 63402.

It is an arithmetic number, because the mean of its divisors is an integer number (21946140).

Almost surely, 2^745220432 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 745220432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877845600).

745220432 is an abundant number, since it is smaller than the sum of its proper divisors (1010470768).

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

745220432 is a wasteful number, since it uses less digits than its factorization.

745220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13164 (or 13158 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 745220432 is about 27298.7258310713. The cubic root of 745220432 is about 906.6261705769.

Adding to 745220432 its reverse (234022547), we get a palindrome (979242979).

The spelling of 745220432 in words is "seven hundred forty-five million, two hundred twenty thousand, four hundred thirty-two".