74578720 has 48 divisors (see below), whose sum is σ = 182279160. Its totient is φ = 28801024.

The previous prime is 74578709. The next prime is 74578723. The reversal of 74578720 is 2787547.

It can be written as a sum of positive squares in 4 ways, for example, as 49056016 + 25522704 = 7004^2 + 5052^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (74578723) 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, 3397 + ... + 12676.

Almost surely, 2^74578720 is an apocalyptic number.

It is an amenable number.

74578720 is an abundant number, since it is smaller than the sum of its proper divisors (107700440).

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

74578720 is a wasteful number, since it uses less digits than its factorization.

74578720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16117 (or 16109 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 74578720 is about 8635.8971740057. The cubic root of 74578720 is about 420.9252466843.

The spelling of 74578720 in words is "seventy-four million, five hundred seventy-eight thousand, seven hundred twenty".