30185946 has 96 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 8153136.

The previous prime is 30185941. The next prime is 30185951. The reversal of 30185946 is 64958103.

It is an interprime number because it is at equal distance from previous prime (30185941) and next prime (30185951).

It is a super-2 number, since 2×30185946² = 1822382671829832, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30185946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30185941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64405 + ... + 64871.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

It is a vampire number, since it can be written as 3591 ⋅ 8406 (with its own digits).

Almost surely, 2^30185946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30185946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40884480).

30185946 is an abundant number, since it is smaller than the sum of its proper divisors (51583014).

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

30185946 is a wasteful number, since it uses less digits than its factorization.

30185946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 30185946 is about 5494.1738232422. The cubic root of 30185946 is about 311.3639037314.

The spelling of 30185946 in words is "thirty million, one hundred eighty-five thousand, nine hundred forty-six".