30697290 has 48 divisors (see below), whose sum is σ = 85955688. Its totient is φ = 7555968.

The previous prime is 30697273. The next prime is 30697319. The reversal of 30697290 is 9279603.

It can be written as a sum of positive squares in 4 ways, for example, as 12981609 + 17715681 = 3603^2 + 4209^2 .

It is a super-2 number, since 2×30697290² = 1884647226688200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11949 + ... + 14288.

Almost surely, 2^30697290 is an apocalyptic number.

30697290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30697290 is an abundant number, since it is smaller than the sum of its proper divisors (55258398).

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

30697290 is a wasteful number, since it uses less digits than its factorization.

30697290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26263 (or 26260 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 30697290 is about 5540.5135141068. The cubic root of 30697290 is about 313.1122163617.

The spelling of 30697290 in words is "thirty million, six hundred ninety-seven thousand, two hundred ninety".