74405487 has 16 divisors (see below), whose sum is σ = 110286848. Its totient is φ = 44310240.

The previous prime is 74405479. The next prime is 74405497. The reversal of 74405487 is 78450447.

It is not a de Polignac number, because 74405487 - 2³ = 74405479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74405407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29563 + ... + 31980.

It is an arithmetic number, because the mean of its divisors is an integer number (6892928).

Almost surely, 2^74405487 is an apocalyptic number.

74405487 is a deficient number, since it is larger than the sum of its proper divisors (35881361).

74405487 is a wasteful number, since it uses less digits than its factorization.

74405487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61590.

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 74405487 is about 8625.8615221901. The cubic root of 74405487 is about 420.5990827114.

The spelling of 74405487 in words is "seventy-four million, four hundred five thousand, four hundred eighty-seven".