30661370 has 16 divisors (see below), whose sum is σ = 58437288. Its totient is φ = 11543040.

The previous prime is 30661363. The next prime is 30661403. The reversal of 30661370 is 7316603.

It can be written as a sum of positive squares in 4 ways, for example, as 27994681 + 2666689 = 5291^2 + 1633^2 .

It is a super-2 number, since 2×30661370² = 1880239220553800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90011 + ... + 90350.

Almost surely, 2^30661370 is an apocalyptic number.

30661370 is a deficient number, since it is larger than the sum of its proper divisors (27775918).

30661370 is a wasteful number, since it uses less digits than its factorization.

30661370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180385.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 30661370 is about 5537.2709884924. The cubic root of 30661370 is about 312.9900407505.

Adding to 30661370 its reverse (7316603), we get a palindrome (37977973).

The spelling of 30661370 in words is "thirty million, six hundred sixty-one thousand, three hundred seventy".