30442428 has 18 divisors (see below), whose sum is σ = 76951784. Its totient is φ = 10147464.

The previous prime is 30442411. The next prime is 30442429. The reversal of 30442428 is 82424403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30442429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 422776 + ... + 422847.

Almost surely, 2^30442428 is an apocalyptic number.

It is an amenable number.

30442428 is an abundant number, since it is smaller than the sum of its proper divisors (46509356).

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

30442428 is a wasteful number, since it uses less digits than its factorization.

30442428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845633 (or 845628 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 30442428 is about 5517.4657225940. The cubic root of 30442428 is about 312.2432767292.

The spelling of 30442428 in words is "thirty million, four hundred forty-two thousand, four hundred twenty-eight".