745211920 has 40 divisors (see below), whose sum is σ = 1823811840. Its totient is φ = 282395520.

The previous prime is 745211917. The next prime is 745211921. The reversal of 745211920 is 29112547.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (745211921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243616 + ... + 246655.

It is an arithmetic number, because the mean of its divisors is an integer number (45595296).

Almost surely, 2^745211920 is an apocalyptic number.

It is an amenable number.

745211920 is an abundant number, since it is smaller than the sum of its proper divisors (1078599920).

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

745211920 is a wasteful number, since it uses less digits than its factorization.

745211920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490303 (or 490297 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 745211920 is about 27298.5699259137. The cubic root of 745211920 is about 906.6227186983.

The spelling of 745211920 in words is "seven hundred forty-five million, two hundred eleven thousand, nine hundred twenty".