745471720 has 32 divisors (see below), whose sum is σ = 1916928000. Its totient is φ = 255590208.

The previous prime is 745471703. The next prime is 745471733. The reversal of 745471720 is 27174547.

It is a self number, because there is not a number n which added to its sum of digits gives 745471720.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1330920 + ... + 1331479.

It is an arithmetic number, because the mean of its divisors is an integer number (59904000).

Almost surely, 2^745471720 is an apocalyptic number.

745471720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

745471720 is an abundant number, since it is smaller than the sum of its proper divisors (1171456280).

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

745471720 is a wasteful number, since it uses less digits than its factorization.

745471720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662417 (or 2662413 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 745471720 is about 27303.3280022784. The cubic root of 745471720 is about 906.7280637729.

It can be divided in two parts, 74547 and 1720, that added together give a palindrome (76267).

The spelling of 745471720 in words is "seven hundred forty-five million, four hundred seventy-one thousand, seven hundred twenty".