30187946 has 8 divisors (see below), whose sum is σ = 45476964. Its totient is φ = 15028960.

The previous prime is 30187943. The next prime is 30187957. The reversal of 30187946 is 64978103.

It can be written as a sum of positive squares in 2 ways, for example, as 28890625 + 1297321 = 5375^2 + 1139^2 .

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

It is a super-2 number, since 2×30187946² = 1822624167397832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30187943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31925 + ... + 32856.

Almost surely, 2^30187946 is an apocalyptic number.

30187946 is a deficient number, since it is larger than the sum of its proper divisors (15289018).

30187946 is a wasteful number, since it uses less digits than its factorization.

30187946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65016.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 30187946 is about 5494.3558312144. The cubic root of 30187946 is about 311.3707801550.

The spelling of 30187946 in words is "thirty million, one hundred eighty-seven thousand, nine hundred forty-six".