74320312 has 16 divisors (see below), whose sum is σ = 152019000. Its totient is φ = 33781920.

The previous prime is 74320307. The next prime is 74320313. The reversal of 74320312 is 21302347.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74320313) 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, 422187 + ... + 422362.

Almost surely, 2^74320312 is an apocalyptic number.

It is an amenable number.

74320312 is an abundant number, since it is smaller than the sum of its proper divisors (77698688).

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

74320312 is a wasteful number, since it uses less digits than its factorization.

74320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844566 (or 844562 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 74320312 is about 8620.9229204303. The cubic root of 74320312 is about 420.4385291154.

Adding to 74320312 its reverse (21302347), we get a palindrome (95622659).

The spelling of 74320312 in words is "seventy-four million, three hundred twenty thousand, three hundred twelve".