1028694408 has 64 divisors (see below), whose sum is σ = 2943941760. Its totient is φ = 293431296.

The previous prime is 1028694397. The next prime is 1028694427. The reversal of 1028694408 is 8044968201.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1028694408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105016 + ... + 114392.

It is an arithmetic number, because the mean of its divisors is an integer number (45999090).

Almost surely, 2^1028694408 is an apocalyptic number.

It is an amenable number.

1028694408 is an abundant number, since it is smaller than the sum of its proper divisors (1915247352).

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

1028694408 is a wasteful number, since it uses less digits than its factorization.

1028694408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046 (or 10042 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1028694408 is about 32073.2662508825. The cubic root of 1028694408 is about 1009.4747482927.

The spelling of 1028694408 in words is "one billion, twenty-eight million, six hundred ninety-four thousand, four hundred eight".