30711490 has 16 divisors (see below), whose sum is σ = 55367352. Its totient is φ = 12265344.

The previous prime is 30711451. The next prime is 30711491. The reversal of 30711490 is 9411703.

It can be written as a sum of positive squares in 4 ways, for example, as 26101881 + 4609609 = 5109^2 + 2147^2 .

It is not an unprimeable number, because it can be changed into a prime (30711491) 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, 5542 + ... + 9598.

Almost surely, 2^30711490 is an apocalyptic number.

30711490 is a deficient number, since it is larger than the sum of its proper divisors (24655862).

30711490 is a wasteful number, since it uses less digits than its factorization.

30711490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 30711490 is about 5541.7948356106. The cubic root of 30711490 is about 313.1604888973.

The spelling of 30711490 in words is "thirty million, seven hundred eleven thousand, four hundred ninety".