30678340 has 72 divisors (see below), whose sum is σ = 80974656. Its totient is φ = 9556800.

The previous prime is 30678299. The next prime is 30678341. The reversal of 30678340 is 4387603.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (30678341) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16035 + ... + 17845.

It is an arithmetic number, because the mean of its divisors is an integer number (1124648).

Almost surely, 2^30678340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30678340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40487328).

30678340 is an abundant number, since it is smaller than the sum of its proper divisors (50296316).

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

30678340 is a wasteful number, since it uses less digits than its factorization.

30678340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 30678340 is about 5538.8031198085. The cubic root of 30678340 is about 313.0477731284.

The spelling of 30678340 in words is "thirty million, six hundred seventy-eight thousand, three hundred forty".