1280528408 has 64 divisors (see below), whose sum is σ = 2699136000. Its totient is φ = 566697600.

The previous prime is 1280528407. The next prime is 1280528411. The reversal of 1280528408 is 8048250821.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280528401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131963 + ... + 141333.

It is an arithmetic number, because the mean of its divisors is an integer number (42174000).

Almost surely, 2^1280528408 is an apocalyptic number.

It is an amenable number.

1280528408 is an abundant number, since it is smaller than the sum of its proper divisors (1418607592).

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

1280528408 is a wasteful number, since it uses less digits than its factorization.

1280528408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9456 (or 9452 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 1280528408 is about 35784.4716043146. The cubic root of 1280528408 is about 1085.9164344148.

The spelling of 1280528408 in words is "one billion, two hundred eighty million, five hundred twenty-eight thousand, four hundred eight".