30985000 has 40 divisors (see below), whose sum is σ = 72609570. Its totient is φ = 12392000.

The previous prime is 30984973. The next prime is 30985051. The reversal of 30985000 is 58903.

It can be written as a sum of positive squares in 5 ways, for example, as 93636 + 30891364 = 306^2 + 5558^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1902 + ... + 8098.

Almost surely, 2^30985000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30985000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36304785).

30985000 is an abundant number, since it is smaller than the sum of its proper divisors (41624570).

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

30985000 is an equidigital number, since it uses as much as digits as its factorization.

30985000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223 (or 6204 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 30985000 is about 5566.4171600770. The cubic root of 30985000 is about 314.0873896349.

The spelling of 30985000 in words is "thirty million, nine hundred eighty-five thousand".