87440689 has 8 divisors (see below), whose sum is σ = 101340288. Its totient is φ = 73893120.

The previous prime is 87440681. The next prime is 87440693. The reversal of 87440689 is 98604478.

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 87440689 - 2³ = 87440681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87440681) 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, 87472 + ... + 88465.

It is an arithmetic number, because the mean of its divisors is an integer number (12667536).

Almost surely, 2^87440689 is an apocalyptic number.

It is an amenable number.

87440689 is a deficient number, since it is larger than the sum of its proper divisors (13899599).

87440689 is a wasteful number, since it uses less digits than its factorization.

87440689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176015.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 87440689 is about 9350.9726232088. The cubic root of 87440689 is about 443.8516687234.

The spelling of 87440689 in words is "eighty-seven million, four hundred forty thousand, six hundred eighty-nine".