104217840 has 140 divisors (see below), whose sum is σ = 363496824. Its totient is φ = 27775872.

The previous prime is 104217833. The next prime is 104217857. The reversal of 104217840 is 48712401.

It is a super-2 number, since 2×104217840² = 21722716348531200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 57427 + ... + 59213.

Almost surely, 2^104217840 is an apocalyptic number.

104217840 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 104217840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181748412).

104217840 is an abundant number, since it is smaller than the sum of its proper divisors (259278984).

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

104217840 is an equidigital number, since it uses as much as digits as its factorization.

104217840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1797 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 104217840 is about 10208.7139248781. The cubic root of 104217840 is about 470.5950513474.

The spelling of 104217840 in words is "one hundred four million, two hundred seventeen thousand, eight hundred forty".