30997146 has 16 divisors (see below), whose sum is σ = 64689984. Its totient is φ = 9883104.

The previous prime is 30997121. The next prime is 30997147. The reversal of 30997146 is 64179903.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30997147) 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, 112171 + ... + 112446.

It is an arithmetic number, because the mean of its divisors is an integer number (4043124).

Almost surely, 2^30997146 is an apocalyptic number.

30997146 is an abundant number, since it is smaller than the sum of its proper divisors (33692838).

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

30997146 is a wasteful number, since it uses less digits than its factorization.

30997146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224645.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 30997146 is about 5567.5080601648. The cubic root of 30997146 is about 314.1284246203.

The spelling of 30997146 in words is "thirty million, nine hundred ninety-seven thousand, one hundred forty-six".