74720620 has 24 divisors (see below), whose sum is σ = 168984144. Its totient is φ = 27589056.

The previous prime is 74720599. The next prime is 74720623. The reversal of 74720620 is 2602747.

It is not an unprimeable number, because it can be changed into a prime (74720623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143434 + ... + 143953.

It is an arithmetic number, because the mean of its divisors is an integer number (7041006).

Almost surely, 2^74720620 is an apocalyptic number.

It is an amenable number.

74720620 is an abundant number, since it is smaller than the sum of its proper divisors (94263524).

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

74720620 is a wasteful number, since it uses less digits than its factorization.

74720620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287409 (or 287407 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 74720620 is about 8644.1089766384. The cubic root of 74720620 is about 421.1920406189.

The spelling of 74720620 in words is "seventy-four million, seven hundred twenty thousand, six hundred twenty".