74281536 has 280 divisors, whose sum is σ = 265541760. Its totient is φ = 20072448.

The previous prime is 74281489. The next prime is 74281541. The reversal of 74281536 is 63518247.

74281536 is a `hidden beast` number, since 7 + 42 + 81 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 74281536.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 834580 + ... + 834668.

Almost surely, 2^74281536 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 74281536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132770880).

74281536 is an abundant number, since it is smaller than the sum of its proper divisors (191260224).

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

74281536 is a wasteful number, since it uses less digits than its factorization.

74281536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 124 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 74281536 is about 8618.6736798651. The cubic root of 74281536 is about 420.3653963020.

The spelling of 74281536 in words is "seventy-four million, two hundred eighty-one thousand, five hundred thirty-six".