74505312 has 192 divisors, whose sum is σ = 252887040. Its totient is φ = 20901888.

The previous prime is 74505311. The next prime is 74505313. The reversal of 74505312 is 21350547.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74505311) and next prime (74505313).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74505311) 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 in 31 ways as a sum of consecutive naturals, for example, 586593 + ... + 586719.

It is an arithmetic number, because the mean of its divisors is an integer number (1317120).

Almost surely, 2^74505312 is an apocalyptic number.

74505312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74505312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126443520).

74505312 is an abundant number, since it is smaller than the sum of its proper divisors (178381728).

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

74505312 is a wasteful number, since it uses less digits than its factorization.

74505312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 74505312 is about 8631.6459612289. The cubic root of 74505312 is about 420.7870954613.

Adding to 74505312 its reverse (21350547), we get a palindrome (95855859).

The spelling of 74505312 in words is "seventy-four million, five hundred five thousand, three hundred twelve".