745820320 has 96 divisors (see below), whose sum is σ = 2078770176. Its totient is φ = 247449600.

The previous prime is 745820303. The next prime is 745820363. The reversal of 745820320 is 23028547.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23980 + ... + 45460.

It is an arithmetic number, because the mean of its divisors is an integer number (21653856).

Almost surely, 2^745820320 is an apocalyptic number.

745820320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745820320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039385088).

745820320 is an abundant number, since it is smaller than the sum of its proper divisors (1332949856).

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

745820320 is a wasteful number, since it uses less digits than its factorization.

745820320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21534 (or 21526 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 745820320 is about 27309.7110933089. The cubic root of 745820320 is about 906.8693774931.

Adding to 745820320 its reverse (23028547), we get a palindrome (768848867).

The spelling of 745820320 in words is "seven hundred forty-five million, eight hundred twenty thousand, three hundred twenty".