74728423224 has 192 divisors, whose sum is σ = 249442851840. Its totient is φ = 19681056000.

The previous prime is 74728423163. The next prime is 74728423241. The reversal of 74728423224 is 42232482747.

74728423224 is a `hidden beast` number, since 7 + 47 + 284 + 2 + 322 + 4 = 666.

It is a Cunningham number, because it is equal to 273365²-1.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 74728423224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4912959 + ... + 4928145.

It is an arithmetic number, because the mean of its divisors is an integer number (1299181520).

Almost surely, 2^74728423224 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 74728423224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124721425920).

74728423224 is an abundant number, since it is smaller than the sum of its proper divisors (174714428616).

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

74728423224 is a wasteful number, since it uses less digits than its factorization.

74728423224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15970 (or 15963 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 45.

The spelling of 74728423224 in words is "seventy-four billion, seven hundred twenty-eight million, four hundred twenty-three thousand, two hundred twenty-four".