74489857 has 16 divisors (see below), whose sum is σ = 82909008. Its totient is φ = 66493440.

The previous prime is 74489839. The next prime is 74489873. The reversal of 74489857 is 75898447.

It can be written as a sum of positive squares in 8 ways, for example, as 512656 + 73977201 = 716^2 + 8601^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74489857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74489887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49557 + ... + 51037.

It is an arithmetic number, because the mean of its divisors is an integer number (5181813).

Almost surely, 2^74489857 is an apocalyptic number.

It is an amenable number.

74489857 is a deficient number, since it is larger than the sum of its proper divisors (8419151).

74489857 is a wasteful number, since it uses less digits than its factorization.

74489857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its digits is 2257920, while the sum is 52.

The square root of 74489857 is about 8630.7506626017. The cubic root of 74489857 is about 420.7579981432.

It can be divided in two parts, 744 and 89857, that added together give a square (90601 = 301²).

The spelling of 74489857 in words is "seventy-four million, four hundred eighty-nine thousand, eight hundred fifty-seven".