74728945 has 8 divisors (see below), whose sum is σ = 89726400. Its totient is φ = 59748720.

The previous prime is 74728931. The next prime is 74728949. The reversal of 74728945 is 54982747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74728945 - 2¹⁵ = 74696177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74728895 and 74728904.

It is not an unprimeable number, because it can be changed into a prime (74728949) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8956 + ... + 15154.

It is an arithmetic number, because the mean of its divisors is an integer number (11215800).

Almost surely, 2^74728945 is an apocalyptic number.

It is an amenable number.

74728945 is a deficient number, since it is larger than the sum of its proper divisors (14997455).

74728945 is a wasteful number, since it uses less digits than its factorization.

74728945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615.

The product of its digits is 564480, while the sum is 46.

The square root of 74728945 is about 8644.5905050500. The cubic root of 74728945 is about 421.2076824124.

It can be divided in two parts, 747 and 28945, that added together give a palindrome (29692).

The spelling of 74728945 in words is "seventy-four million, seven hundred twenty-eight thousand, nine hundred forty-five".