30345381 has 32 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 18154800.

The previous prime is 30345379. The next prime is 30345389. The reversal of 30345381 is 18354303.

It is a happy number.

It is not a de Polignac number, because 30345381 - 2¹ = 30345379 is a prime.

It is a super-2 number, since 2×30345381² = 1841684296070322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30345389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24036 + ... + 25266.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^30345381 is an apocalyptic number.

It is an amenable number.

30345381 is a deficient number, since it is larger than the sum of its proper divisors (19328859).

30345381 is a wasteful number, since it uses less digits than its factorization.

30345381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30345381 is about 5508.6641756419. The cubic root of 30345381 is about 311.9111248337.

Adding to 30345381 its reverse (18354303), we get a palindrome (48699684).

The spelling of 30345381 in words is "thirty million, three hundred forty-five thousand, three hundred eighty-one".