30688190 has 16 divisors (see below), whose sum is σ = 59488128. Its totient is φ = 11330976.

The previous prime is 30688157. The next prime is 30688199. The reversal of 30688190 is 9188603.

It is a super-2 number, since 2×30688190² = 1883530010952200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30688190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30688199) 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, 117902 + ... + 118161.

It is an arithmetic number, because the mean of its divisors is an integer number (3718008).

Almost surely, 2^30688190 is an apocalyptic number.

30688190 is a deficient number, since it is larger than the sum of its proper divisors (28799938).

30688190 is a wasteful number, since it uses less digits than its factorization.

30688190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236083.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 30688190 is about 5539.6922297182. The cubic root of 30688190 is about 313.0812733179.

The spelling of 30688190 in words is "thirty million, six hundred eighty-eight thousand, one hundred ninety".