30354640 has 20 divisors (see below), whose sum is σ = 70574724. Its totient is φ = 12141824.

The previous prime is 30354629. The next prime is 30354659. The reversal of 30354640 is 4645303.

It can be written as a sum of positive squares in 2 ways, for example, as 3356224 + 26998416 = 1832^2 + 5196^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189637 + ... + 189796.

Almost surely, 2^30354640 is an apocalyptic number.

It is an amenable number.

30354640 is an abundant number, since it is smaller than the sum of its proper divisors (40220084).

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

30354640 is a wasteful number, since it uses less digits than its factorization.

30354640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379446 (or 379440 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 30354640 is about 5509.5045149269. The cubic root of 30354640 is about 311.9428451080.

Adding to 30354640 its reverse (4645303), we get a palindrome (34999943).

The spelling of 30354640 in words is "thirty million, three hundred fifty-four thousand, six hundred forty".