1240804128 has 48 divisors (see below), whose sum is σ = 3259206720. Its totient is φ = 413335296.

The previous prime is 1240804073. The next prime is 1240804129. The reversal of 1240804128 is 8214080421.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1240804095 and 1240804104.

It is not an unprimeable number, because it can be changed into a prime (1240804129) 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, 195501 + ... + 201747.

It is an arithmetic number, because the mean of its divisors is an integer number (67900140).

Almost surely, 2^1240804128 is an apocalyptic number.

It is an amenable number.

1240804128 is an abundant number, since it is smaller than the sum of its proper divisors (2018402592).

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

1240804128 is a wasteful number, since it uses less digits than its factorization.

1240804128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8329 (or 8321 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 1240804128 is about 35225.0497231729. The cubic root of 1240804128 is about 1074.5692532048.

Adding to 1240804128 its reverse (8214080421), we get a palindrome (9454884549).

The spelling of 1240804128 in words is "one billion, two hundred forty million, eight hundred four thousand, one hundred twenty-eight".