30985960 has 32 divisors (see below), whose sum is σ = 73389600. Its totient is φ = 11741760.

The previous prime is 30985943. The next prime is 30985961. The reversal of 30985960 is 6958903.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (30985961) 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, 19626 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (2293425).

Almost surely, 2^30985960 is an apocalyptic number.

It is an amenable number.

30985960 is an abundant number, since it is smaller than the sum of its proper divisors (42403640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30985960 is a wasteful number, since it uses less digits than its factorization.

30985960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40801 (or 40797 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 30985960 is about 5566.5033908191. The cubic root of 30985960 is about 314.0906333634.

The spelling of 30985960 in words is "thirty million, nine hundred eighty-five thousand, nine hundred sixty".