30971398 has 8 divisors (see below), whose sum is σ = 47333808. Its totient is φ = 15193464.

The previous prime is 30971393. The next prime is 30971417. The reversal of 30971398 is 89317903.

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

It is a self number, because there is not a number n which added to its sum of digits gives 30971398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30971393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145986 + ... + 146197.

It is an arithmetic number, because the mean of its divisors is an integer number (5916726).

Almost surely, 2^30971398 is an apocalyptic number.

30971398 is a deficient number, since it is larger than the sum of its proper divisors (16362410).

30971398 is a wasteful number, since it uses less digits than its factorization.

30971398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292238.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 30971398 is about 5565.1952346706. The cubic root of 30971398 is about 314.0414228555.

The spelling of 30971398 in words is "thirty million, nine hundred seventy-one thousand, three hundred ninety-eight".