30688146 has 20 divisors (see below), whose sum is σ = 68764542. Its totient is φ = 10229328.

The previous prime is 30688139. The next prime is 30688157. The reversal of 30688146 is 64188603.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 11634921 = 4365^2 + 3411^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30688146.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 94555 + ... + 94878.

Almost surely, 2^30688146 is an apocalyptic number.

30688146 is an abundant number, since it is smaller than the sum of its proper divisors (38076396).

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

30688146 is a wasteful number, since it uses less digits than its factorization.

30688146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189447 (or 189438 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 30688146 is about 5539.6882583770. The cubic root of 30688146 is about 313.0811236883.

The spelling of 30688146 in words is "thirty million, six hundred eighty-eight thousand, one hundred forty-six".