74433520 has 80 divisors (see below), whose sum is σ = 206415360. Its totient is φ = 24406272.

The previous prime is 74433509. The next prime is 74433547. The reversal of 74433520 is 2533447.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9991 + ... + 15769.

It is an arithmetic number, because the mean of its divisors is an integer number (2580192).

Almost surely, 2^74433520 is an apocalyptic number.

74433520 is a gapful number since it is divisible by the number (70) 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 74433520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103207680).

74433520 is an abundant number, since it is smaller than the sum of its proper divisors (131981840).

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

74433520 is a wasteful number, since it uses less digits than its factorization.

74433520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822 (or 5816 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 74433520 is about 8627.4863083056. The cubic root of 74433520 is about 420.6518976946.

Adding to 74433520 its reverse (2533447), we get a palindrome (76966967).

The spelling of 74433520 in words is "seventy-four million, four hundred thirty-three thousand, five hundred twenty".