74726730 has 144 divisors (see below), whose sum is σ = 223530840. Its totient is φ = 17312256.

The previous prime is 74726699. The next prime is 74726731. The reversal of 74726730 is 3762747.

It can be written as a sum of positive squares in 12 ways, for example, as 25281 + 74701449 = 159^2 + 8643^2 .

It is not an unprimeable number, because it can be changed into a prime (74726731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4395682 + ... + 4395698.

Almost surely, 2^74726730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74726730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111765420).

74726730 is an abundant number, since it is smaller than the sum of its proper divisors (148804110).

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

74726730 is a wasteful number, since it uses less digits than its factorization.

74726730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 74726730 is about 8644.4623892987. The cubic root of 74726730 is about 421.2035207753.

The spelling of 74726730 in words is "seventy-four million, seven hundred twenty-six thousand, seven hundred thirty".