74287138 has 8 divisors (see below), whose sum is σ = 111543120. Its totient is φ = 37106100.

The previous prime is 74287117. The next prime is 74287139. The reversal of 74287138 is 83178247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 74287138.

It is not an unprimeable number, because it can be changed into a prime (74287139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16188 + ... + 20263.

It is an arithmetic number, because the mean of its divisors is an integer number (13942890).

Almost surely, 2^74287138 is an apocalyptic number.

74287138 is a deficient number, since it is larger than the sum of its proper divisors (37255982).

74287138 is a wasteful number, since it uses less digits than its factorization.

74287138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37472.

The product of its digits is 75264, while the sum is 40.

The square root of 74287138 is about 8618.9986657384. The cubic root of 74287138 is about 420.3759634311.

The spelling of 74287138 in words is "seventy-four million, two hundred eighty-seven thousand, one hundred thirty-eight".