74878660 has 24 divisors (see below), whose sum is σ = 157411800. Its totient is φ = 29919744.

The previous prime is 74878633. The next prime is 74878663. The reversal of 74878660 is 6687847.

It can be written as a sum of positive squares in 4 ways, for example, as 20502784 + 54375876 = 4528^2 + 7374^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74878660.

It is not an unprimeable number, because it can be changed into a prime (74878663) 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, 29772 + ... + 32188.

It is an arithmetic number, because the mean of its divisors is an integer number (6558825).

Almost surely, 2^74878660 is an apocalyptic number.

It is an amenable number.

74878660 is an abundant number, since it is smaller than the sum of its proper divisors (82533140).

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

74878660 is a wasteful number, since it uses less digits than its factorization.

74878660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975 (or 3973 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 74878660 is about 8653.2456338648. The cubic root of 74878660 is about 421.4887829592.

The spelling of 74878660 in words is "seventy-four million, eight hundred seventy-eight thousand, six hundred sixty".