30689386 has 72 divisors (see below), whose sum is σ = 61960140. Its totient is φ = 11321856.

The previous prime is 30689363. The next prime is 30689387. The reversal of 30689386 is 68398603.

It can be written as a sum of positive squares in 6 ways, for example, as 11055625 + 19633761 = 3325^2 + 4431^2 .

It is a super-3 number, since 3×30689386³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30689387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 281500 + ... + 281608.

Almost surely, 2^30689386 is an apocalyptic number.

30689386 is an abundant number, since it is smaller than the sum of its proper divisors (31270754).

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

30689386 is a wasteful number, since it uses less digits than its factorization.

30689386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 30689386 is about 5539.8001769017. The cubic root of 30689386 is about 313.0853404670.

The spelling of 30689386 in words is "thirty million, six hundred eighty-nine thousand, three hundred eighty-six".