87881775 has 48 divisors (see below), whose sum is σ = 150418944. Its totient is φ = 45249280.

The previous prime is 87881747. The next prime is 87881779. The reversal of 87881775 is 57718878.

It is a happy number.

It is not a de Polignac number, because 87881775 - 2¹⁵ = 87849007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87881779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 377059 + ... + 377291.

It is an arithmetic number, because the mean of its divisors is an integer number (3133728).

Almost surely, 2^87881775 is an apocalyptic number.

87881775 is a deficient number, since it is larger than the sum of its proper divisors (62537169).

87881775 is a wasteful number, since it uses less digits than its factorization.

87881775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 395 counting only the distinct ones).

The product of its digits is 878080, while the sum is 51.

The square root of 87881775 is about 9374.5279881176. The cubic root of 87881775 is about 444.5967394169.

The spelling of 87881775 in words is "eighty-seven million, eight hundred eighty-one thousand, seven hundred seventy-five".