30421404 has 36 divisors (see below), whose sum is σ = 82815096. Its totient is φ = 9360288.

The previous prime is 30421373. The next prime is 30421411. The reversal of 30421404 is 40412403.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 32034 + ... + 32969.

Almost surely, 2^30421404 is an apocalyptic number.

It is an amenable number.

30421404 is an abundant number, since it is smaller than the sum of its proper divisors (52393692).

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

30421404 is a wasteful number, since it uses less digits than its factorization.

30421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65026 (or 65021 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30421404 is about 5515.5601710071. The cubic root of 30421404 is about 312.1713802034.

Adding to 30421404 its reverse (40412403), we get a palindrome (70833807).

Subtracting 30421404 from its reverse (40412403), we obtain a palindrome (9990999).

The spelling of 30421404 in words is "thirty million, four hundred twenty-one thousand, four hundred four".