30780290 has 16 divisors (see below), whose sum is σ = 55562112. Its totient is φ = 12277104.

The previous prime is 30780289. The next prime is 30780311. The reversal of 30780290 is 9208703.

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 7 ways as a sum of consecutive naturals, for example, 524 + ... + 7863.

It is an arithmetic number, because the mean of its divisors is an integer number (3472632).

Almost surely, 2^30780290 is an apocalyptic number.

30780290 is a deficient number, since it is larger than the sum of its proper divisors (24781822).

30780290 is a wasteful number, since it uses less digits than its factorization.

30780290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 30780290 is about 5547.9987382839. The cubic root of 30780290 is about 313.3941622760.

Adding to 30780290 its reverse (9208703), we get a palindrome (39988993).

The spelling of 30780290 in words is "thirty million, seven hundred eighty thousand, two hundred ninety".