308409444 has 240 divisors, whose sum is σ = 1029409920. Its totient is φ = 78382080.

The previous prime is 308409401. The next prime is 308409449. The reversal of 308409444 is 444904803.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 308409399 and 308409408.

It is not an unprimeable number, because it can be changed into a prime (308409449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 732354 + ... + 732774.

It is an arithmetic number, because the mean of its divisors is an integer number (4289208).

Almost surely, 2^308409444 is an apocalyptic number.

308409444 is a gapful number since it is divisible by the number (34) 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 308409444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514704960).

308409444 is an abundant number, since it is smaller than the sum of its proper divisors (721000476).

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

308409444 is a wasteful number, since it uses less digits than its factorization.

308409444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 308409444 is about 17561.5900191298. The cubic root of 308409444 is about 675.6304628043.

The spelling of 308409444 in words is "three hundred eight million, four hundred nine thousand, four hundred forty-four".