74578745 has 8 divisors (see below), whose sum is σ = 94758984. Its totient is φ = 56153344.

The previous prime is 74578729. The next prime is 74578747. The reversal of 74578745 is 54787547.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37356544 + 37222201 = 6112^2 + 6101^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 74578745 - 2⁴ = 74578729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74578745.

It is not an unprimeable number, because it can be changed into a prime (74578747) 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, 438614 + ... + 438783.

It is an arithmetic number, because the mean of its divisors is an integer number (11844873).

Almost surely, 2^74578745 is an apocalyptic number.

It is an amenable number.

74578745 is a deficient number, since it is larger than the sum of its proper divisors (20180239).

74578745 is a wasteful number, since it uses less digits than its factorization.

74578745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877419.

The product of its digits is 1097600, while the sum is 47.

The square root of 74578745 is about 8635.8986214522. The cubic root of 74578745 is about 420.9252937179.

The spelling of 74578745 in words is "seventy-four million, five hundred seventy-eight thousand, seven hundred forty-five".