104628821 has 12 divisors (see below), whose sum is σ = 115328556. Its totient is φ = 94849920.

The previous prime is 104628809. The next prime is 104628857. The reversal of 104628821 is 128826401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6400900 + 98227921 = 2530^2 + 9911^2 .

It is not a de Polignac number, because 104628821 - 2⁶ = 104628757 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 (104628221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51395 + ... + 53391.

It is an arithmetic number, because the mean of its divisors is an integer number (9610713).

Almost surely, 2^104628821 is an apocalyptic number.

104628821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

104628821 is a deficient number, since it is larger than the sum of its proper divisors (10699735).

104628821 is a wasteful number, since it uses less digits than its factorization.

104628821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452 (or 2441 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 104628821 is about 10228.8230505762. The cubic root of 104628821 is about 471.2128340926.

The spelling of 104628821 in words is "one hundred four million, six hundred twenty-eight thousand, eight hundred twenty-one".