30855985 has 8 divisors (see below), whose sum is σ = 37930536. Its totient is φ = 24082560.

The previous prime is 30855977. The next prime is 30856043. The reversal of 30855985 is 58955803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3272481 + 27583504 = 1809^2 + 5252^2 .

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

It is not a de Polignac number, because 30855985 - 2³ = 30855977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75054 + ... + 75463.

It is an arithmetic number, because the mean of its divisors is an integer number (4741317).

Almost surely, 2^30855985 is an apocalyptic number.

It is an amenable number.

30855985 is a deficient number, since it is larger than the sum of its proper divisors (7074551).

30855985 is a wasteful number, since it uses less digits than its factorization.

30855985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150563.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 30855985 is about 5554.8163786033. The cubic root of 30855985 is about 313.6508519909.

The spelling of 30855985 in words is "thirty million, eight hundred fifty-five thousand, nine hundred eighty-five".