30381490 has 8 divisors (see below), whose sum is σ = 54686700. Its totient is φ = 12152592.

The previous prime is 30381487. The next prime is 30381493. The reversal of 30381490 is 9418303.

It is an interprime number because it is at equal distance from previous prime (30381487) and next prime (30381493).

It can be written as a sum of positive squares in 2 ways, for example, as 27447121 + 2934369 = 5239^2 + 1713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (30381493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519065 + ... + 1519084.

Almost surely, 2^30381490 is an apocalyptic number.

30381490 is a deficient number, since it is larger than the sum of its proper divisors (24305210).

30381490 is a wasteful number, since it uses less digits than its factorization.

30381490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038156.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30381490 is about 5511.9406745719. The cubic root of 30381490 is about 312.0347936762.

Adding to 30381490 its reverse (9418303), we get a palindrome (39799793).

The spelling of 30381490 in words is "thirty million, three hundred eighty-one thousand, four hundred ninety".