30678156 has 24 divisors (see below), whose sum is σ = 79536240. Its totient is φ = 10226016.

The previous prime is 30678139. The next prime is 30678163. The reversal of 30678156 is 65187603.

It is a super-2 number, since 2×30678156² = 1882298511120672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30678156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141921 + ... + 142136.

It is an arithmetic number, because the mean of its divisors is an integer number (3314010).

Almost surely, 2^30678156 is an apocalyptic number.

30678156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30678156 is an abundant number, since it is smaller than the sum of its proper divisors (48858084).

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

30678156 is a wasteful number, since it uses less digits than its factorization.

30678156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284070 (or 284062 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 30678156 is about 5538.7865096969. The cubic root of 30678156 is about 313.0471472698.

The spelling of 30678156 in words is "thirty million, six hundred seventy-eight thousand, one hundred fifty-six".