74720415 has 32 divisors (see below), whose sum is σ = 149054976. Its totient is φ = 31052160.

The previous prime is 74720413. The next prime is 74720417. The reversal of 74720415 is 51402747.

It is an interprime number because it is at equal distance from previous prime (74720413) and next prime (74720417).

It is not a de Polignac number, because 74720415 - 2¹ = 74720413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74720413) 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 31 ways as a sum of consecutive naturals, for example, 31192 + ... + 33501.

It is an arithmetic number, because the mean of its divisors is an integer number (4657968).

Almost surely, 2^74720415 is an apocalyptic number.

74720415 is a deficient number, since it is larger than the sum of its proper divisors (74334561).

74720415 is a wasteful number, since it uses less digits than its factorization.

74720415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64719.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 74720415 is about 8644.0971188436. The cubic root of 74720415 is about 421.1916554309.

The spelling of 74720415 in words is "seventy-four million, seven hundred twenty thousand, four hundred fifteen".