74864144 has 10 divisors (see below), whose sum is σ = 145049310. Its totient is φ = 37432064.

The previous prime is 74864131. The next prime is 74864147. The reversal of 74864144 is 44146847.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 34668544 = 6340^2 + 5888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74864098 and 74864107.

It is not an unprimeable number, because it can be changed into a prime (74864147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2339489 + ... + 2339520.

It is an arithmetic number, because the mean of its divisors is an integer number (14504931).

Almost surely, 2^74864144 is an apocalyptic number.

It is an amenable number.

74864144 is a deficient number, since it is larger than the sum of its proper divisors (70185166).

74864144 is a wasteful number, since it uses less digits than its factorization.

74864144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679017 (or 4679011 counting only the distinct ones).

The product of its digits is 86016, while the sum is 38.

The square root of 74864144 is about 8652.4068327836. The cubic root of 74864144 is about 421.4615445508.

The spelling of 74864144 in words is "seventy-four million, eight hundred sixty-four thousand, one hundred forty-four".