1289097328428 has 576 divisors, whose sum is σ = 4368764108800. Its totient is φ = 310913717760.

The previous prime is 1289097328339. The next prime is 1289097328433. The reversal of 1289097328428 is 8248237909821.

1289097328428 is a `hidden beast` number, since 1 + 2 + 8 + 90 + 97 + 32 + 8 + 428 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1240709133 + ... + 1240710171.

Almost surely, 2^{1289097328428} is an apocalyptic number.

1289097328428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289097328428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2184382054400).

1289097328428 is an abundant number, since it is smaller than the sum of its proper divisors (3079666780372).

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

1289097328428 is a wasteful number, since it uses less digits than its factorization.

1289097328428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 1289097328428 in words is "one trillion, two hundred eighty-nine billion, ninety-seven million, three hundred twenty-eight thousand, four hundred twenty-eight".