68028399 has 6 divisors (see below), whose sum is σ = 98263256. Its totient is φ = 45352260.

The previous prime is 68028397. The next prime is 68028419. The reversal of 68028399 is 99382086.

It is not a de Polignac number, because 68028399 - 2¹ = 68028397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68028391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3779347 + ... + 3779364.

Almost surely, 2^68028399 is an apocalyptic number.

68028399 is a deficient number, since it is larger than the sum of its proper divisors (30234857).

68028399 is a wasteful number, since it uses less digits than its factorization.

68028399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558717 (or 7558714 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 68028399 is about 8247.9330137920. The cubic root of 68028399 is about 408.2223233243. Note that the first 3 decimals are identical.

The spelling of 68028399 in words is "sixty-eight million, twenty-eight thousand, three hundred ninety-nine".