30997070 has 16 divisors (see below), whose sum is σ = 60086880. Its totient is φ = 11445024.

The previous prime is 30997061. The next prime is 30997073. The reversal of 30997070 is 7079903.

It is a self number, because there is not a number n which added to its sum of digits gives 30997070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30997073) 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, 119090 + ... + 119349.

It is an arithmetic number, because the mean of its divisors is an integer number (3755430).

Almost surely, 2^30997070 is an apocalyptic number.

30997070 is a deficient number, since it is larger than the sum of its proper divisors (29089810).

30997070 is a wasteful number, since it uses less digits than its factorization.

30997070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238459.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 30997070 is about 5567.5012348449. The cubic root of 30997070 is about 314.1281678893.

It can be divided in two parts, 309 and 97070, that added together give a palindrome (97379).

The spelling of 30997070 in words is "thirty million, nine hundred ninety-seven thousand, seventy".