74864072 has 8 divisors (see below), whose sum is σ = 140370150. Its totient is φ = 37432032.

The previous prime is 74864063. The next prime is 74864077. The reversal of 74864072 is 27046847.

It can be written as a sum of positive squares in only one way, i.e., 47969476 + 26894596 = 6926^2 + 5186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (74864077) 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 as a sum of consecutive naturals, namely, 4678997 + ... + 4679012.

Almost surely, 2^74864072 is an apocalyptic number.

It is an amenable number.

74864072 is a deficient number, since it is larger than the sum of its proper divisors (65506078).

74864072 is a wasteful number, since it uses less digits than its factorization.

74864072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358015 (or 9358011 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 74864072 is about 8652.4026720906. The cubic root of 74864072 is about 421.4614094383.

Subtracting from 74864072 its reverse (27046847), we obtain a square (47817225 = 6915²).

The spelling of 74864072 in words is "seventy-four million, eight hundred sixty-four thousand, seventy-two".