104286640 has 80 divisors (see below), whose sum is σ = 249359040. Its totient is φ = 40550400.

The previous prime is 104286629. The next prime is 104286647. The reversal of 104286640 is 46682401.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (104286647) 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 15 ways as a sum of consecutive naturals, for example, 690565 + ... + 690715.

It is an arithmetic number, because the mean of its divisors is an integer number (3116988).

Almost surely, 2^104286640 is an apocalyptic number.

104286640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104286640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124679520).

104286640 is an abundant number, since it is smaller than the sum of its proper divisors (145072400).

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

104286640 is a wasteful number, since it uses less digits than its factorization.

104286640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 104286640 is about 10212.0830392237. The cubic root of 104286640 is about 470.6985839017.

The spelling of 104286640 in words is "one hundred four million, two hundred eighty-six thousand, six hundred forty".