74720355 has 16 divisors (see below), whose sum is σ = 126585504. Its totient is φ = 37506560.

The previous prime is 74720311. The next prime is 74720357. The reversal of 74720355 is 55302747.

It is not a de Polignac number, because 74720355 - 2⁷ = 74720227 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (74720357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146256 + ... + 146765.

It is an arithmetic number, because the mean of its divisors is an integer number (7911594).

Almost surely, 2^74720355 is an apocalyptic number.

74720355 is a deficient number, since it is larger than the sum of its proper divisors (51865149).

74720355 is a wasteful number, since it uses less digits than its factorization.

74720355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293046.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 74720355 is about 8644.0936482664. The cubic root of 74720355 is about 421.1915426928.

The spelling of 74720355 in words is "seventy-four million, seven hundred twenty thousand, three hundred fifty-five".