30281372 has 24 divisors (see below), whose sum is σ = 58275840. Its totient is φ = 13653360.

The previous prime is 30281371. The next prime is 30281431. The reversal of 30281372 is 27318203.

It is a super-2 number, since 2×30281372² = 1833922980404768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30281371) 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 7 ways as a sum of consecutive naturals, for example, 2879 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (2428160).

Almost surely, 2^30281372 is an apocalyptic number.

It is an amenable number.

30281372 is a deficient number, since it is larger than the sum of its proper divisors (27994468).

30281372 is a wasteful number, since it uses less digits than its factorization.

30281372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5559 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30281372 is about 5502.8512609374. The cubic root of 30281372 is about 311.6916606428.

Adding to 30281372 its reverse (27318203), we get a palindrome (57599575).

The spelling of 30281372 in words is "thirty million, two hundred eighty-one thousand, three hundred seventy-two".