87398861 has 8 divisors (see below), whose sum is σ = 95428800. Its totient is φ = 79383040.

The previous prime is 87398851. The next prime is 87398869. The reversal of 87398861 is 16889378.

It is a happy number.

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

It is not a de Polignac number, because 87398861 - 2¹⁰ = 87397837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87398869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12680 + ... + 18318.

It is an arithmetic number, because the mean of its divisors is an integer number (11928600).

Almost surely, 2^87398861 is an apocalyptic number.

It is an amenable number.

87398861 is a deficient number, since it is larger than the sum of its proper divisors (8029939).

87398861 is a wasteful number, since it uses less digits than its factorization.

87398861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7059.

The product of its digits is 580608, while the sum is 50.

The square root of 87398861 is about 9348.7357968872. The cubic root of 87398861 is about 443.7808840239.

The spelling of 87398861 in words is "eighty-seven million, three hundred ninety-eight thousand, eight hundred sixty-one".