87771842 has 16 divisors (see below), whose sum is σ = 136311552. Its totient is φ = 42360480.

The previous prime is 87771839. The next prime is 87771851. The reversal of 87771842 is 24817778.

It is a junction number, because it is equal to n+sod(n) for n = 87771793 and 87771802.

It is an unprimeable number.

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, 467 + ... + 13257.

It is an arithmetic number, because the mean of its divisors is an integer number (8519472).

Almost surely, 2^87771842 is an apocalyptic number.

87771842 is a deficient number, since it is larger than the sum of its proper divisors (48539710).

87771842 is a wasteful number, since it uses less digits than its factorization.

87771842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12913.

The product of its digits is 175616, while the sum is 44.

The square root of 87771842 is about 9368.6627647706. The cubic root of 87771842 is about 444.4112771962.

The spelling of 87771842 in words is "eighty-seven million, seven hundred seventy-one thousand, eight hundred forty-two".