74644040 has 16 divisors (see below), whose sum is σ = 167949180. Its totient is φ = 29857600.

The previous prime is 74644013. The next prime is 74644079. The reversal of 74644040 is 4044647.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 649636 = 8602^2 + 806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74643994 and 74644012.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 933011 + ... + 933090.

Almost surely, 2^74644040 is an apocalyptic number.

It is an amenable number.

74644040 is an abundant number, since it is smaller than the sum of its proper divisors (93305140).

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

74644040 is a wasteful number, since it uses less digits than its factorization.

74644040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866112 (or 1866108 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 74644040 is about 8639.6782347493. The cubic root of 74644040 is about 421.0481003789.

Adding to 74644040 its reverse (4044647), we get a palindrome (78688687).

The spelling of 74644040 in words is "seventy-four million, six hundred forty-four thousand, forty".