30820406 has 8 divisors (see below), whose sum is σ = 46403280. Its totient is φ = 15352648.

The previous prime is 30820373. The next prime is 30820421. The reversal of 30820406 is 60402803.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28106 + ... + 29181.

It is an arithmetic number, because the mean of its divisors is an integer number (5800410).

Almost surely, 2^30820406 is an apocalyptic number.

30820406 is a deficient number, since it is larger than the sum of its proper divisors (15582874).

30820406 is a wasteful number, since it uses less digits than its factorization.

30820406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57558.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 30820406 is about 5551.6129187832. The cubic root of 30820406 is about 313.5302522047.

The spelling of 30820406 in words is "thirty million, eight hundred twenty thousand, four hundred six".