308870381820 has 384 divisors, whose sum is σ = 1184888678400. Its totient is φ = 59243304960.

The previous prime is 308870381819. The next prime is 308870381837. The reversal of 308870381820 is 28183078803.

It is a self number, because there is not a number n which added to its sum of digits gives 308870381820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2890464 + ... + 2995416.

It is an arithmetic number, because the mean of its divisors is an integer number (3085647600).

Almost surely, 2^308870381820 is an apocalyptic number.

308870381820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308870381820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592444339200).

308870381820 is an abundant number, since it is smaller than the sum of its proper divisors (876018296580).

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

308870381820 is a wasteful number, since it uses less digits than its factorization.

308870381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105010 (or 104994 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 308870381820 in words is "three hundred eight billion, eight hundred seventy million, three hundred eighty-one thousand, eight hundred twenty".