308220390976 has 63 divisors (see below), whose sum is σ = 633707426131. Its totient is φ = 148733871104.

The previous prime is 308220390953. The next prime is 308220390977. The reversal of 308220390976 is 679093022803.

The square root of 308220390976 is 555176.

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

It can be written as a sum of positive squares in 4 ways, for example, as 102989646400 + 205230744576 = 320920^2 + 453024^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308220390977) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 128799636 + ... + 128802028.

Almost surely, 2^308220390976 is an apocalyptic number.

308220390976 is the 555176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308220390976

308220390976 is an abundant number, since it is smaller than the sum of its proper divisors (325487035155).

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

308220390976 is an frugal number, since it uses more digits than its factorization.

308220390976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4856 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

Multiplying 308220390976 by its sum of digits (49), we get a square (15102799157824 = 3886232²).

The spelling of 308220390976 in words is "three hundred eight billion, two hundred twenty million, three hundred ninety thousand, nine hundred seventy-six".