308820272656 has 135 divisors (see below), whose sum is σ = 707106544461. Its totient is φ = 130277613312.

The previous prime is 308820272639. The next prime is 308820272669. The reversal of 308820272656 is 656272028803.

The square root of 308820272656 is 555716.

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., 59300042256 + 249520230400 = 243516^2 + 499520^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1384844161 + ... + 1384844383.

Almost surely, 2^308820272656 is an apocalyptic number.

308820272656 is the 555716-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308820272656

308820272656 is an abundant number, since it is smaller than the sum of its proper divisors (398286271805).

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

308820272656 is an frugal number, since it uses more digits than its factorization.

308820272656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

Multiplying 308820272656 by its sum of digits (49), we get a square (15132193360144 = 3890012²).

308820272656 divided by its sum of digits (49) gives a square (6302454544 = 79388²).

The spelling of 308820272656 in words is "three hundred eight billion, eight hundred twenty million, two hundred seventy-two thousand, six hundred fifty-six".