30819402 has 96 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 8870400.

The previous prime is 30819361. The next prime is 30819421. The reversal of 30819402 is 20491803.

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 47 ways as a sum of consecutive naturals, for example, 204027 + ... + 204177.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^30819402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30819402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38413440).

30819402 is an abundant number, since it is smaller than the sum of its proper divisors (46007478).

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

30819402 is a wasteful number, since it uses less digits than its factorization.

30819402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30819402 is about 5551.5224938750. The cubic root of 30819402 is about 313.5268476660.

The spelling of 30819402 in words is "thirty million, eight hundred nineteen thousand, four hundred two".