87404505 has 8 divisors (see below), whose sum is σ = 139847232. Its totient is φ = 46615728.

The previous prime is 87404467. The next prime is 87404507. The reversal of 87404505 is 50540478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87404505 - 2⁶ = 87404441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87404507) 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 7 ways as a sum of consecutive naturals, for example, 2913469 + ... + 2913498.

It is an arithmetic number, because the mean of its divisors is an integer number (17480904).

Almost surely, 2^87404505 is an apocalyptic number.

It is an amenable number.

87404505 is a deficient number, since it is larger than the sum of its proper divisors (52442727).

87404505 is a wasteful number, since it uses less digits than its factorization.

87404505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826975.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 87404505 is about 9349.0376510099. The cubic root of 87404505 is about 443.7904365717.

The spelling of 87404505 in words is "eighty-seven million, four hundred four thousand, five hundred five".