104172820 has 24 divisors (see below), whose sum is σ = 230277600. Its totient is φ = 39475872.

The previous prime is 104172799. The next prime is 104172847. The reversal of 104172820 is 28271401.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136690 + ... + 137449.

It is an arithmetic number, because the mean of its divisors is an integer number (9594900).

Almost surely, 2^104172820 is an apocalyptic number.

104172820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104172820 is an abundant number, since it is smaller than the sum of its proper divisors (126104780).

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

104172820 is a wasteful number, since it uses less digits than its factorization.

104172820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274167 (or 274165 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 104172820 is about 10206.5087076826. The cubic root of 104172820 is about 470.5272790715.

The spelling of 104172820 in words is "one hundred four million, one hundred seventy-two thousand, eight hundred twenty".