74831520 has 192 divisors, whose sum is σ = 250822656. Its totient is φ = 18723840.

The previous prime is 74831509. The next prime is 74831521. The reversal of 74831520 is 2513847.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (74831521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699307 + ... + 699413.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^74831520 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 74831520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125411328).

74831520 is an abundant number, since it is smaller than the sum of its proper divisors (175991136).

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

74831520 is a wasteful number, since it uses less digits than its factorization.

74831520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 74831520 is about 8650.5213715706. The cubic root of 74831520 is about 421.4003147085.

The spelling of 74831520 in words is "seventy-four million, eight hundred thirty-one thousand, five hundred twenty".