74821140 has 36 divisors (see below), whose sum is σ = 226958004. Its totient is φ = 19952256.

The previous prime is 74821121. The next prime is 74821147. The reversal of 74821140 is 4112847.

It can be written as a sum of positive squares in 2 ways, for example, as 13793796 + 61027344 = 3714^2 + 7812^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74821147) 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 11 ways as a sum of consecutive naturals, for example, 207657 + ... + 208016.

It is an arithmetic number, because the mean of its divisors is an integer number (6304389).

Almost surely, 2^74821140 is an apocalyptic number.

It is an amenable number.

74821140 is an abundant number, since it is smaller than the sum of its proper divisors (152136864).

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

74821140 is a wasteful number, since it uses less digits than its factorization.

74821140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415688 (or 415683 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 74821140 is about 8649.9213869260. The cubic root of 74821140 is about 421.3808294366.

Adding to 74821140 its reverse (4112847), we get a palindrome (78933987).

The spelling of 74821140 in words is "seventy-four million, eight hundred twenty-one thousand, one hundred forty".