30012156 has 36 divisors (see below), whose sum is σ = 76380304. Its totient is φ = 9936000.

The previous prime is 30012149. The next prime is 30012163. The reversal of 30012156 is 65121003.

It is an interprime number because it is at equal distance from previous prime (30012149) and next prime (30012163).

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 8196.

Almost surely, 2^30012156 is an apocalyptic number.

30012156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30012156 is an abundant number, since it is smaller than the sum of its proper divisors (46368148).

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

30012156 is a wasteful number, since it uses less digits than its factorization.

30012156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682 (or 5677 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 30012156 is about 5478.3351485648. The cubic root of 30012156 is about 310.7652132818.

Adding to 30012156 its reverse (65121003), we get a palindrome (95133159).

The spelling of 30012156 in words is "thirty million, twelve thousand, one hundred fifty-six".