30431090 has 16 divisors (see below), whose sum is σ = 55942272. Its totient is φ = 11913264.

The previous prime is 30431087. The next prime is 30431099. The reversal of 30431090 is 9013403.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30431099) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31904 + ... + 32843.

It is an arithmetic number, because the mean of its divisors is an integer number (3496392).

Almost surely, 2^30431090 is an apocalyptic number.

30431090 is a deficient number, since it is larger than the sum of its proper divisors (25511182).

30431090 is a wasteful number, since it uses less digits than its factorization.

30431090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64801.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 30431090 is about 5516.4381624378. The cubic root of 30431090 is about 312.2045078782.

Adding to 30431090 its reverse (9013403), we get a palindrome (39444493).

The spelling of 30431090 in words is "thirty million, four hundred thirty-one thousand, ninety".