74280312 has 48 divisors (see below), whose sum is σ = 206620440. Its totient is φ = 24090048.

The previous prime is 74280299. The next prime is 74280319. The reversal of 74280312 is 21308247.

74280312 is a `hidden beast` number, since 74 + 280 + 312 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74280319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11278 + ... + 16605.

Almost surely, 2^74280312 is an apocalyptic number.

74280312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

74280312 is an abundant number, since it is smaller than the sum of its proper divisors (132340128).

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

74280312 is a wasteful number, since it uses less digits than its factorization.

74280312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27932 (or 27925 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 74280312 is about 8618.6026709670. The cubic root of 74280312 is about 420.3630873833.

Adding to 74280312 its reverse (21308247), we get a palindrome (95588559).

The spelling of 74280312 in words is "seventy-four million, two hundred eighty thousand, three hundred twelve".