87404405 has 16 divisors (see below), whose sum is σ = 118368000. Its totient is φ = 61373760.

The previous prime is 87404377. The next prime is 87404417. The reversal of 87404405 is 50440478.

It is a de Polignac number, because none of the positive numbers 2^k-87404405 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 25805 + ... + 28994.

It is an arithmetic number, because the mean of its divisors is an integer number (7398000).

Almost surely, 2^87404405 is an apocalyptic number.

It is an amenable number.

87404405 is a deficient number, since it is larger than the sum of its proper divisors (30963595).

87404405 is a wasteful number, since it uses less digits than its factorization.

87404405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54844.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 87404405 is about 9349.0323028643. The cubic root of 87404405 is about 443.7902673239.

The spelling of 87404405 in words is "eighty-seven million, four hundred four thousand, four hundred five".