30681156 has 24 divisors (see below), whose sum is σ = 78097824. Its totient is φ = 9297280.

The previous prime is 30681139. The next prime is 30681163. The reversal of 30681156 is 65118603.

It is a super-3 number, since 3×30681156³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116085 + ... + 116348.

It is an arithmetic number, because the mean of its divisors is an integer number (3254076).

Almost surely, 2^30681156 is an apocalyptic number.

It is an amenable number.

30681156 is an abundant number, since it is smaller than the sum of its proper divisors (47416668).

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

30681156 is a wasteful number, since it uses less digits than its factorization.

30681156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232451 (or 232449 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 30681156 is about 5539.0573205194. The cubic root of 30681156 is about 313.0573511733.

Adding to 30681156 its reverse (65118603), we get a palindrome (95799759).

It can be divided in two parts, 3068 and 1156, that added together give a palindrome (4224).

The spelling of 30681156 in words is "thirty million, six hundred eighty-one thousand, one hundred fifty-six".