308238156864 has 315 divisors, whose sum is σ = 1005765524533. Its totient is φ = 93272256000.

The previous prime is 308238156857. The next prime is 308238156953. The reversal of 308238156864 is 468651832803.

The square root of 308238156864 is 555192.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 265835110464 + 42403046400 = 515592^2 + 205920^2 .

It is a super-2 number, since 2×308238156864² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 308238156864.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 439711714 + ... + 439712414.

Almost surely, 2^308238156864 is an apocalyptic number.

308238156864 is the 555192-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308238156864

308238156864 is an abundant number, since it is smaller than the sum of its proper divisors (697527367669).

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

308238156864 is an frugal number, since it uses more digits than its factorization.

308238156864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 308238156864 in words is "three hundred eight billion, two hundred thirty-eight million, one hundred fifty-six thousand, eight hundred sixty-four".