74635220 has 36 divisors (see below), whose sum is σ = 172283412. Its totient is φ = 27139200.

The previous prime is 74635199. The next prime is 74635237. The reversal of 74635220 is 2253647.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 30492484 = 6644^2 + 5522^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13001 + ... + 17840.

Almost surely, 2^74635220 is an apocalyptic number.

It is an amenable number.

74635220 is an abundant number, since it is smaller than the sum of its proper divisors (97648192).

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

74635220 is a wasteful number, since it uses less digits than its factorization.

74635220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30872 (or 30859 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 74635220 is about 8639.1677839940. The cubic root of 74635220 is about 421.0315159312.

Adding to 74635220 its reverse (2253647), we get a palindrome (76888867).

The spelling of 74635220 in words is "seventy-four million, six hundred thirty-five thousand, two hundred twenty".