74287530 has 96 divisors (see below), whose sum is σ = 210974400. Its totient is φ = 18755712.

The previous prime is 74287517. The next prime is 74287541. The reversal of 74287530 is 3578247.

74287530 is a `hidden beast` number, since 7 + 42 + 87 + 530 = 666.

It is a super-2 number, since 2×74287530² = 11037274227001800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 45366 + ... + 46974.

It is an arithmetic number, because the mean of its divisors is an integer number (2197650).

Almost surely, 2^74287530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74287530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105487200).

74287530 is an abundant number, since it is smaller than the sum of its proper divisors (136686870).

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

74287530 is a wasteful number, since it uses less digits than its factorization.

74287530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 74287530 is about 8619.0214061690. The cubic root of 74287530 is about 420.3767028462.

The spelling of 74287530 in words is "seventy-four million, two hundred eighty-seven thousand, five hundred thirty".