104865820 has 24 divisors (see below), whose sum is σ = 225341424. Its totient is φ = 40970496.

The previous prime is 104865799. The next prime is 104865841. The reversal of 104865820 is 28568401.

It is an interprime number because it is at equal distance from previous prime (104865799) and next prime (104865841).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60109 + ... + 61828.

It is an arithmetic number, because the mean of its divisors is an integer number (9389226).

Almost surely, 2^104865820 is an apocalyptic number.

104865820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104865820 is an abundant number, since it is smaller than the sum of its proper divisors (120475604).

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

104865820 is a wasteful number, since it uses less digits than its factorization.

104865820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121989 (or 121987 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 104865820 is about 10240.4013593218. The cubic root of 104865820 is about 471.5683535820.

The spelling of 104865820 in words is "one hundred four million, eight hundred sixty-five thousand, eight hundred twenty".