30771985 has 8 divisors (see below), whose sum is σ = 36965376. Its totient is φ = 24591600.

The previous prime is 30771943. The next prime is 30771997. The reversal of 30771985 is 58917703.

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

It is not a de Polignac number, because 30771985 - 2⁷ = 30771857 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, 3082 + ... + 8428.

It is an arithmetic number, because the mean of its divisors is an integer number (4620672).

Almost surely, 2^30771985 is an apocalyptic number.

It is an amenable number.

30771985 is a deficient number, since it is larger than the sum of its proper divisors (6193391).

30771985 is a wasteful number, since it uses less digits than its factorization.

30771985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 30771985 is about 5547.2502197035. The cubic root of 30771985 is about 313.3659735375.

The spelling of 30771985 in words is "thirty million, seven hundred seventy-one thousand, nine hundred eighty-five".