104391540 has 108 divisors (see below), whose sum is σ = 348130692. Its totient is φ = 25301760.

The previous prime is 104391527. The next prime is 104391563. The reversal of 104391540 is 45193401.

It can be written as a sum of positive squares in 2 ways, for example, as 65901924 + 38489616 = 8118^2 + 6204^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19384 + ... + 24176.

Almost surely, 2^104391540 is an apocalyptic number.

104391540 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 104391540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174065346).

104391540 is an abundant number, since it is smaller than the sum of its proper divisors (243739152).

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

104391540 is a wasteful number, since it uses less digits than its factorization.

104391540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4814 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 104391540 is about 10217.2178209139. The cubic root of 104391540 is about 470.8563533441.

The spelling of 104391540 in words is "one hundred four million, three hundred ninety-one thousand, five hundred forty".