87271778 has 16 divisors (see below), whose sum is σ = 151209504. Its totient is φ = 37335360.

The previous prime is 87271771. The next prime is 87271783. The reversal of 87271778 is 87717278.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87271771) 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, 116300 + ... + 117047.

It is an arithmetic number, because the mean of its divisors is an integer number (9450594).

Almost surely, 2^87271778 is an apocalyptic number.

87271778 is a deficient number, since it is larger than the sum of its proper divisors (63937726).

87271778 is a wasteful number, since it uses less digits than its factorization.

87271778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233377.

The product of its digits is 307328, while the sum is 47.

The square root of 87271778 is about 9341.9365230128. The cubic root of 87271778 is about 443.5656853269.

The spelling of 87271778 in words is "eighty-seven million, two hundred seventy-one thousand, seven hundred seventy-eight".