74020224 has 64 divisors (see below), whose sum is σ = 200381040. Its totient is φ = 24201216.

The previous prime is 74020223. The next prime is 74020237. The reversal of 74020224 is 42202047.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×74020224² = 10957987122020352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74020224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18534 + ... + 22170.

Almost surely, 2^74020224 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 74020224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100190520).

74020224 is an abundant number, since it is smaller than the sum of its proper divisors (126360816).

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

74020224 is a wasteful number, since it uses less digits than its factorization.

74020224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 74020224 is about 8603.5006828616. The cubic root of 74020224 is about 419.8718883640.

The spelling of 74020224 in words is "seventy-four million, twenty thousand, two hundred twenty-four".