30421208 has 8 divisors (see below), whose sum is σ = 57039780. Its totient is φ = 15210600.

The previous prime is 30421207. The next prime is 30421247. The reversal of 30421208 is 80212403.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 30421208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30421201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1901318 + ... + 1901333.

Almost surely, 2^30421208 is an apocalyptic number.

It is an amenable number.

30421208 is a deficient number, since it is larger than the sum of its proper divisors (26618572).

30421208 is a wasteful number, since it uses less digits than its factorization.

30421208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802657 (or 3802653 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 30421208 is about 5515.5424030643. The cubic root of 30421208 is about 312.1707097793.

It can be divided in two parts, 304 and 21208, that added together give a palindrome (21512).

The spelling of 30421208 in words is "thirty million, four hundred twenty-one thousand, two hundred eight".