30919944 has 64 divisors (see below), whose sum is σ = 84939840. Its totient is φ = 9301760.

The previous prime is 30919943. The next prime is 30919949. The reversal of 30919944 is 44991903.

It is not an unprimeable number, because it can be changed into a prime (30919943) 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 15 ways as a sum of consecutive naturals, for example, 45334 + ... + 46010.

It is an arithmetic number, because the mean of its divisors is an integer number (1327185).

Almost surely, 2^30919944 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 30919944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42469920).

30919944 is an abundant number, since it is smaller than the sum of its proper divisors (54019896).

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

30919944 is a wasteful number, since it uses less digits than its factorization.

30919944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 30919944 is about 5560.5704743308. The cubic root of 30919944 is about 313.8674166752.

The spelling of 30919944 in words is "thirty million, nine hundred nineteen thousand, nine hundred forty-four".