308305777780 has 192 divisors, whose sum is σ = 871891517952. Its totient is φ = 88438210560.

The previous prime is 308305777771. The next prime is 308305777799. The reversal of 308305777780 is 87777503803.

It is a happy number.

It is a super-2 number, since 2×308305777780² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6723892 + ... + 6769588.

It is an arithmetic number, because the mean of its divisors is an integer number (4541101656).

Almost surely, 2^308305777780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308305777780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435945758976).

308305777780 is an abundant number, since it is smaller than the sum of its proper divisors (563585740172).

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

308305777780 is a wasteful number, since it uses less digits than its factorization.

308305777780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46074 (or 46072 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 55.

The spelling of 308305777780 in words is "three hundred eight billion, three hundred five million, seven hundred seventy-seven thousand, seven hundred eighty".