308689472 has 56 divisors (see below), whose sum is σ = 753928896. Its totient is φ = 122116608.

The previous prime is 308689471. The next prime is 308689487. The reversal of 308689472 is 274986803.

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

It is not an unprimeable number, because it can be changed into a prime (308689471) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20678 + ... + 32325.

It is an arithmetic number, because the mean of its divisors is an integer number (13463016).

Almost surely, 2^308689472 is an apocalyptic number.

308689472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

308689472 is an abundant number, since it is smaller than the sum of its proper divisors (445239424).

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

308689472 is a wasteful number, since it uses less digits than its factorization.

308689472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53035 (or 53025 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 308689472 is about 17569.5609506897. The cubic root of 308689472 is about 675.8348860888.

The spelling of 308689472 in words is "three hundred eight million, six hundred eighty-nine thousand, four hundred seventy-two".