87864387 has 8 divisors (see below), whose sum is σ = 126164304. Its totient is φ = 54070368.

The previous prime is 87864383. The next prime is 87864473. The reversal of 87864387 is 78346878.

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

It is not a de Polignac number, because 87864387 - 2² = 87864383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87864383) 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 7 ways as a sum of consecutive naturals, for example, 1126428 + ... + 1126505.

It is an arithmetic number, because the mean of its divisors is an integer number (15770538).

Almost surely, 2^87864387 is an apocalyptic number.

87864387 is a deficient number, since it is larger than the sum of its proper divisors (38299917).

87864387 is a wasteful number, since it uses less digits than its factorization.

87864387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252949.

The product of its digits is 1806336, while the sum is 51.

The square root of 87864387 is about 9373.6005355466. The cubic root of 87864387 is about 444.5674153315.

The spelling of 87864387 in words is "eighty-seven million, eight hundred sixty-four thousand, three hundred eighty-seven".