308420672 has 56 divisors (see below), whose sum is σ = 701161920. Its totient is φ = 131857920.

The previous prime is 308420653. The next prime is 308420677. The reversal of 308420672 is 276024803.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (308420677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317147 + ... + 318117.

Almost surely, 2^308420672 is an apocalyptic number.

308420672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308420672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350580960).

308420672 is an abundant number, since it is smaller than the sum of its proper divisors (392741248).

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

308420672 is an equidigital number, since it uses as much as digits as its factorization.

308420672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 308420672 is about 17561.9096911469. The cubic root of 308420672 is about 675.6386617391.

The spelling of 308420672 in words is "three hundred eight million, four hundred twenty thousand, six hundred seventy-two".