28994469422808 has 16 divisors (see below), whose sum is σ = 72486173557080. Its totient is φ = 9664823140928.

The previous prime is 28994469422803. The next prime is 28994469422819. The reversal of 28994469422808 is 80822496449982.

It is a super-2 number, since 2×28994469422808² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28994469422808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28994469422803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604051446285 + ... + 604051446332.

Almost surely, 2^{28994469422808} is an apocalyptic number.

It is an amenable number.

28994469422808 is an abundant number, since it is smaller than the sum of its proper divisors (43491704134272).

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

28994469422808 is a wasteful number, since it uses less digits than its factorization.

28994469422808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208102892626 (or 1208102892622 counting only the distinct ones).

The product of its (nonzero) digits is 1146617856, while the sum is 75.

The spelling of 28994469422808 in words is "twenty-eight trillion, nine hundred ninety-four billion, four hundred sixty-nine million, four hundred twenty-two thousand, eight hundred eight".