30870939 has 16 divisors (see below), whose sum is σ = 45043200. Its totient is φ = 18651360.

The previous prime is 30870901. The next prime is 30870967. The reversal of 30870939 is 93907803.

It is a happy number.

It is not a de Polignac number, because 30870939 - 2⁷ = 30870811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30870897 and 30870906.

It is not an unprimeable number, because it can be changed into a prime (30870989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10837 + ... + 13385.

It is an arithmetic number, because the mean of its divisors is an integer number (2815200).

Almost surely, 2^30870939 is an apocalyptic number.

30870939 is a deficient number, since it is larger than the sum of its proper divisors (14172261).

30870939 is a wasteful number, since it uses less digits than its factorization.

30870939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930.

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

The square root of 30870939 is about 5556.1622546502. The cubic root of 30870939 is about 313.7015129063.

The spelling of 30870939 in words is "thirty million, eight hundred seventy thousand, nine hundred thirty-nine".