30381012 has 36 divisors (see below), whose sum is σ = 77013300. Its totient is φ = 10098432.

The previous prime is 30381007. The next prime is 30381017. The reversal of 30381012 is 21018303.

It is an interprime number because it is at equal distance from previous prime (30381007) and next prime (30381017).

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 16941456 = 3666^2 + 4116^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14614 + ... + 16562.

Almost surely, 2^30381012 is an apocalyptic number.

It is an amenable number.

30381012 is an abundant number, since it is smaller than the sum of its proper divisors (46632288).

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

30381012 is a wasteful number, since it uses less digits than its factorization.

30381012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 30381012 is about 5511.8973139927. The cubic root of 30381012 is about 312.0331572257.

Adding to 30381012 its reverse (21018303), we get a palindrome (51399315).

The spelling of 30381012 in words is "thirty million, three hundred eighty-one thousand, twelve".