1290878828 has 24 divisors (see below), whose sum is σ = 2298550800. Its totient is φ = 634173120.

The previous prime is 1290878821. The next prime is 1290878839. The reversal of 1290878828 is 8288780921.

It is a self number, because there is not a number n which added to its sum of digits gives 1290878828.

It is not an unprimeable number, because it can be changed into a prime (1290878821) 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, 281498 + ... + 286046.

It is an arithmetic number, because the mean of its divisors is an integer number (95772950).

Almost surely, 2^1290878828 is an apocalyptic number.

It is an amenable number.

1290878828 is a deficient number, since it is larger than the sum of its proper divisors (1007671972).

1290878828 is a wasteful number, since it uses less digits than its factorization.

1290878828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5775 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The square root of 1290878828 is about 35928.8022065863. The cubic root of 1290878828 is about 1088.8343817148.

The spelling of 1290878828 in words is "one billion, two hundred ninety million, eight hundred seventy-eight thousand, eight hundred twenty-eight".