1290528428 has 12 divisors (see below), whose sum is σ = 2581056912. Its totient is φ = 553083600.

The previous prime is 1290528359. The next prime is 1290528433. The reversal of 1290528428 is 8248250921.

It is a happy number.

1290528428 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23045123 + ... + 23045178.

It is an arithmetic number, because the mean of its divisors is an integer number (215088076).

Almost surely, 2^1290528428 is an apocalyptic number.

It is an amenable number.

1290528428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1290528428 is a wasteful number, since it uses less digits than its factorization.

1290528428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46090312 (or 46090310 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1290528428 is about 35923.9255650047. The cubic root of 1290528428 is about 1088.7358539817.

The spelling of 1290528428 in words is "one billion, two hundred ninety million, five hundred twenty-eight thousand, four hundred twenty-eight".