104161780 has 24 divisors (see below), whose sum is σ = 219858408. Its totient is φ = 41451648.

The previous prime is 104161777. The next prime is 104161787. The reversal of 104161780 is 87161401.

It can be written as a sum of positive squares in 4 ways, for example, as 56220004 + 47941776 = 7498^2 + 6924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104161787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9279 + ... + 17158.

It is an arithmetic number, because the mean of its divisors is an integer number (9160767).

Almost surely, 2^104161780 is an apocalyptic number.

104161780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104161780 is an abundant number, since it is smaller than the sum of its proper divisors (115696628).

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

104161780 is a wasteful number, since it uses less digits than its factorization.

104161780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26643 (or 26641 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 104161780 is about 10205.9678619913. The cubic root of 104161780 is about 470.5106566784.

The spelling of 104161780 in words is "one hundred four million, one hundred sixty-one thousand, seven hundred eighty".