68455820 has 24 divisors (see below), whose sum is σ = 150008544. Its totient is φ = 26191616.

The previous prime is 68455819. The next prime is 68455837. The reversal of 68455820 is 2855486.

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, 73949 + ... + 74868.

It is an arithmetic number, because the mean of its divisors is an integer number (6250356).

Almost surely, 2^68455820 is an apocalyptic number.

It is an amenable number.

68455820 is an abundant number, since it is smaller than the sum of its proper divisors (81552724).

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

68455820 is a wasteful number, since it uses less digits than its factorization.

68455820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148849 (or 148847 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 68455820 is about 8273.8032367225. The cubic root of 68455820 is about 409.0754897593.

The spelling of 68455820 in words is "sixty-eight million, four hundred fifty-five thousand, eight hundred twenty".