308470656 has 128 divisors (see below), whose sum is σ = 897755040. Its totient is φ = 93265920.

The previous prime is 308470649. The next prime is 308470667. The reversal of 308470656 is 656074803.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×308470656² = 190308291226140672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304006 + ... + 305018.

Almost surely, 2^308470656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308470656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448877520).

308470656 is an abundant number, since it is smaller than the sum of its proper divisors (589284384).

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

308470656 is a wasteful number, since it uses less digits than its factorization.

308470656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 308470656 is about 17563.3327133548. The cubic root of 308470656 is about 675.6751587509.

The spelling of 308470656 in words is "three hundred eight million, four hundred seventy thousand, six hundred fifty-six".