802128440 has 16 divisors (see below), whose sum is σ = 1804789080. Its totient is φ = 320851360.

The previous prime is 802128413. The next prime is 802128449. The reversal of 802128440 is 44821208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802128449) 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, 10026566 + ... + 10026645.

Almost surely, 2^802128440 is an apocalyptic number.

It is an amenable number.

802128440 is an abundant number, since it is smaller than the sum of its proper divisors (1002660640).

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

802128440 is a wasteful number, since it uses less digits than its factorization.

802128440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053222 (or 20053218 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 802128440 is about 28321.8721132626. The cubic root of 802128440 is about 929.1403162866.

Adding to 802128440 its reverse (44821208), we get a palindrome (846949648).

The spelling of 802128440 in words is "eight hundred two million, one hundred twenty-eight thousand, four hundred forty".