74707220 has 48 divisors (see below), whose sum is σ = 187100928. Its totient is φ = 24499200.

The previous prime is 74707201. The next prime is 74707229. The reversal of 74707220 is 2270747.

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 not an unprimeable number, because it can be changed into a prime (74707229) 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 15 ways as a sum of consecutive naturals, for example, 8381 + ... + 14820.

It is an arithmetic number, because the mean of its divisors is an integer number (3897936).

Almost surely, 2^74707220 is an apocalyptic number.

74707220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74707220 is an abundant number, since it is smaller than the sum of its proper divisors (112393708).

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

74707220 is a wasteful number, since it uses less digits than its factorization.

74707220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23240 (or 23238 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 74707220 is about 8643.3338475382. Note that the first 3 decimals coincide. The cubic root of 74707220 is about 421.1668609975.

Adding to 74707220 its reverse (2270747), we get a palindrome (76977967).

The spelling of 74707220 in words is "seventy-four million, seven hundred seven thousand, two hundred twenty".