30981044 has 24 divisors (see below), whose sum is σ = 55534248. Its totient is φ = 15117440.

The previous prime is 30981031. The next prime is 30981047. The reversal of 30981044 is 44018903.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 30360100 = 788^2 + 5510^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30980998 and 30981016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30981047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66974 + ... + 67434.

It is an arithmetic number, because the mean of its divisors is an integer number (2313927).

Almost surely, 2^30981044 is an apocalyptic number.

It is an amenable number.

30981044 is a deficient number, since it is larger than the sum of its proper divisors (24553204).

30981044 is a wasteful number, since it uses less digits than its factorization.

30981044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30981044 is about 5566.0618034657. The cubic root of 30981044 is about 314.0740220635.

Adding to 30981044 its reverse (44018903), we get a palindrome (74999947).

The spelling of 30981044 in words is "thirty million, nine hundred eighty-one thousand, forty-four".