87171400 has 24 divisors (see below), whose sum is σ = 202673970. Its totient is φ = 34868480.

The previous prime is 87171377. The next prime is 87171437. The reversal of 87171400 is 417178.

It can be written as a sum of positive squares in 3 ways, for example, as 34550884 + 52620516 = 5878^2 + 7254^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217729 + ... + 218128.

Almost surely, 2^87171400 is an apocalyptic number.

It is an amenable number.

87171400 is an abundant number, since it is smaller than the sum of its proper divisors (115502570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87171400 is a wasteful number, since it uses less digits than its factorization.

87171400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435873 (or 435864 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 87171400 is about 9336.5625366084. The cubic root of 87171400 is about 443.3955603886.

Adding to 87171400 its reverse (417178), we get a palindrome (87588578).

It can be divided in two parts, 87171 and 400, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 87171400 in words is "eighty-seven million, one hundred seventy-one thousand, four hundred".