87821410 has 8 divisors (see below), whose sum is σ = 158078556. Its totient is φ = 35128560.

The previous prime is 87821407. The next prime is 87821413. The reversal of 87821410 is 1412878.

It is an interprime number because it is at equal distance from previous prime (87821407) and next prime (87821413).

It can be written as a sum of positive squares in 2 ways, for example, as 74839801 + 12981609 = 8651^2 + 3603^2 .

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

It is not an unprimeable number, because it can be changed into a prime (87821413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4391061 + ... + 4391080.

Almost surely, 2^87821410 is an apocalyptic number.

87821410 is a deficient number, since it is larger than the sum of its proper divisors (70257146).

87821410 is a wasteful number, since it uses less digits than its factorization.

87821410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8782148.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 87821410 is about 9371.3078062776. The cubic root of 87821410 is about 444.4949199386.

The spelling of 87821410 in words is "eighty-seven million, eight hundred twenty-one thousand, four hundred ten".