74447736 has 64 divisors (see below), whose sum is σ = 205873920. Its totient is φ = 22245120.

The previous prime is 74447731. The next prime is 74447741. The reversal of 74447736 is 63774447.

It is an interprime number because it is at equal distance from previous prime (74447731) and next prime (74447741).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74447731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17341 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (3216780).

Almost surely, 2^74447736 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 74447736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102936960).

74447736 is an abundant number, since it is smaller than the sum of its proper divisors (131426184).

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

74447736 is a wasteful number, since it uses less digits than its factorization.

74447736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956 (or 3952 counting only the distinct ones).

The product of its digits is 395136, while the sum is 42.

The square root of 74447736 is about 8628.3101474159. The cubic root of 74447736 is about 420.6786759827.

Subtracting from 74447736 its reverse (63774447), we obtain a square (10673289 = 3267²).

The spelling of 74447736 in words is "seventy-four million, four hundred forty-seven thousand, seven hundred thirty-six".