30685290 has 16 divisors (see below), whose sum is σ = 73644768. Its totient is φ = 8182736.

The previous prime is 30685279. The next prime is 30685301. The reversal of 30685290 is 9258603.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30685279) and next prime (30685301).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511392 + ... + 511451.

It is an arithmetic number, because the mean of its divisors is an integer number (4602798).

Almost surely, 2^30685290 is an apocalyptic number.

30685290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30685290 is an abundant number, since it is smaller than the sum of its proper divisors (42959478).

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

30685290 is a wasteful number, since it uses less digits than its factorization.

30685290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022853.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 30685290 is about 5539.4304761410. The cubic root of 30685290 is about 313.0714110626.

The spelling of 30685290 in words is "thirty million, six hundred eighty-five thousand, two hundred ninety".