308438681000 has 32 divisors (see below), whose sum is σ = 721746515880. Its totient is φ = 123375472000.

The previous prime is 308438680999. The next prime is 308438681009. The reversal of 308438681000 is 186834803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160661482276 + 147777198724 = 400826^2 + 384418^2 .

It is a super-2 number, since 2×308438681000² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308438681009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154218341 + ... + 154220340.

Almost surely, 2^308438681000 is an apocalyptic number.

It is an amenable number.

308438681000 is an abundant number, since it is smaller than the sum of its proper divisors (413307834880).

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

308438681000 is a wasteful number, since it uses less digits than its factorization.

308438681000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308438702 (or 308438688 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 308438681000 in words is "three hundred eight billion, four hundred thirty-eight million, six hundred eighty-one thousand".