30420747 has 24 divisors (see below), whose sum is σ = 50974976. Its totient is φ = 17121456.

The previous prime is 30420721. The next prime is 30420749. The reversal of 30420747 is 74702403.

It is not a de Polignac number, because 30420747 - 2⁶ = 30420683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30420747.

It is not an unprimeable number, because it can be changed into a prime (30420749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618 + ... + 7824.

Almost surely, 2^30420747 is an apocalyptic number.

30420747 is a deficient number, since it is larger than the sum of its proper divisors (20554229).

30420747 is a wasteful number, since it uses less digits than its factorization.

30420747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287 (or 7284 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 30420747 is about 5515.5006119119. The cubic root of 30420747 is about 312.1691329033.

The spelling of 30420747 in words is "thirty million, four hundred twenty thousand, seven hundred forty-seven".