104142440 has 16 divisors (see below), whose sum is σ = 234320580. Its totient is φ = 41656960.

The previous prime is 104142427. The next prime is 104142449. The reversal of 104142440 is 44241401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101163364 + 2979076 = 10058^2 + 1726^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (104142449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301741 + ... + 1301820.

Almost surely, 2^104142440 is an apocalyptic number.

104142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104142440 is an abundant number, since it is smaller than the sum of its proper divisors (130178140).

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

104142440 is a wasteful number, since it uses less digits than its factorization.

104142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603572 (or 2603568 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 104142440 is about 10205.0203331498. The cubic root of 104142440 is about 470.4815345463.

Adding to 104142440 its reverse (44241401), we get a palindrome (148383841).

The spelling of 104142440 in words is "one hundred four million, one hundred forty-two thousand, four hundred forty".