68213928 has 32 divisors (see below), whose sum is σ = 180567360. Its totient is φ = 21400320.

The previous prime is 68213909. The next prime is 68213947. The reversal of 68213928 is 82931286.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68213909) and next prime (68213947).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83188 + ... + 84003.

It is an arithmetic number, because the mean of its divisors is an integer number (5642730).

Almost surely, 2^68213928 is an apocalyptic number.

68213928 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68213928 is an abundant number, since it is smaller than the sum of its proper divisors (112353432).

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

68213928 is a wasteful number, since it uses less digits than its factorization.

68213928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167217 (or 167213 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 68213928 is about 8259.1723556298. The cubic root of 68213928 is about 408.5930916793.

The spelling of 68213928 in words is "sixty-eight million, two hundred thirteen thousand, nine hundred twenty-eight".