74729728 has 36 divisors (see below), whose sum is σ = 149890608. Its totient is φ = 37184000.

The previous prime is 74729719. The next prime is 74729729. The reversal of 74729728 is 82792747.

It is not an unprimeable number, because it can be changed into a prime (74729729) 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, 63675 + ... + 64837.

It is an arithmetic number, because the mean of its divisors is an integer number (4163628).

Almost surely, 2^74729728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74729728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74945304).

74729728 is an abundant number, since it is smaller than the sum of its proper divisors (75160880).

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

74729728 is a wasteful number, since it uses less digits than its factorization.

74729728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1416 counting only the distinct ones).

The product of its digits is 395136, while the sum is 46.

The square root of 74729728 is about 8644.6357933692. The cubic root of 74729728 is about 421.2091535267.

It can be divided in two parts, 74729 and 728, that added together give a palindrome (75457).

The spelling of 74729728 in words is "seventy-four million, seven hundred twenty-nine thousand, seven hundred twenty-eight".