87644338 has 8 divisors (see below), whose sum is σ = 133130880. Its totient is φ = 43267380.

The previous prime is 87644309. The next prime is 87644339. The reversal of 87644338 is 83344678.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 87644294 and 87644303.

It is not an unprimeable number, because it can be changed into a prime (87644339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277198 + ... + 277513.

It is an arithmetic number, because the mean of its divisors is an integer number (16641360).

Almost surely, 2^87644338 is an apocalyptic number.

87644338 is a deficient number, since it is larger than the sum of its proper divisors (45486542).

87644338 is a wasteful number, since it uses less digits than its factorization.

87644338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554792.

The product of its digits is 387072, while the sum is 43.

The square root of 87644338 is about 9361.8554784829. The cubic root of 87644338 is about 444.1959777919.

The spelling of 87644338 in words is "eighty-seven million, six hundred forty-four thousand, three hundred thirty-eight".