74305512 has 128 divisors (see below), whose sum is σ = 217267200. Its totient is φ = 23794560.

The previous prime is 74305493. The next prime is 74305519. The reversal of 74305512 is 21550347.

It is a happy number.

It is a super-2 number, since 2×74305512² = 11042618227164288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (74305519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542308 + ... + 542444.

It is an arithmetic number, because the mean of its divisors is an integer number (1697400).

Almost surely, 2^74305512 is an apocalyptic number.

74305512 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 74305512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108633600).

74305512 is an abundant number, since it is smaller than the sum of its proper divisors (142961688).

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

74305512 is a wasteful number, since it uses less digits than its factorization.

74305512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 173 counting only the distinct ones).

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

The square root of 74305512 is about 8620.0645009188. The cubic root of 74305512 is about 420.4106188301.

Adding to 74305512 its reverse (21550347), we get a palindrome (95855859).

The spelling of 74305512 in words is "seventy-four million, three hundred five thousand, five hundred twelve".