30381489 has 6 divisors (see below), whose sum is σ = 43884386. Its totient is φ = 20254320.

The previous prime is 30381487. The next prime is 30381493. The reversal of 30381489 is 98418303.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 10131489 = 4500^2 + 3183^2 .

It is not a de Polignac number, because 30381489 - 2¹ = 30381487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30381487) 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, 1687852 + ... + 1687869.

Almost surely, 2^30381489 is an apocalyptic number.

It is an amenable number.

30381489 is a deficient number, since it is larger than the sum of its proper divisors (13502897).

30381489 is a wasteful number, since it uses less digits than its factorization.

30381489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375727 (or 3375724 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 30381489 is about 5511.9405838597. The cubic root of 30381489 is about 312.0347902526.

The spelling of 30381489 in words is "thirty million, three hundred eighty-one thousand, four hundred eighty-nine".