745271280 has 280 divisors, whose sum is σ = 2800633248. Its totient is φ = 183264768.

The previous prime is 745271249. The next prime is 745271281. The reversal of 745271280 is 82172547.

745271280 is a `hidden beast` number, since 7 + 4 + 527 + 128 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745271281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 757669 + ... + 758651.

Almost surely, 2^745271280 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 745271280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400316624).

745271280 is an abundant number, since it is smaller than the sum of its proper divisors (2055361968).

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

745271280 is a wasteful number, since it uses less digits than its factorization.

745271280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 745271280 is about 27299.6571407042. The cubic root of 745271280 is about 906.6467904620.

The spelling of 745271280 in words is "seven hundred forty-five million, two hundred seventy-one thousand, two hundred eighty".