30688149 has 8 divisors (see below), whose sum is σ = 40960672. Its totient is φ = 20437200.

The previous prime is 30688139. The next prime is 30688157. The reversal of 30688149 is 94188603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30688149 - 2⁸ = 30687893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30688139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (5120084).

Almost surely, 2^30688149 is an apocalyptic number.

It is an amenable number.

30688149 is a deficient number, since it is larger than the sum of its proper divisors (10272523).

30688149 is a wasteful number, since it uses less digits than its factorization.

30688149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10787.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 30688149 is about 5539.6885291504. The cubic root of 30688149 is about 313.0811338903.

The spelling of 30688149 in words is "thirty million, six hundred eighty-eight thousand, one hundred forty-nine".