30387249 has 12 divisors (see below), whose sum is σ = 45079476. Its totient is φ = 19710432.

The previous prime is 30387187. The next prime is 30387293. The reversal of 30387249 is 94278303.

30387249 is a `hidden beast` number, since 30 + 387 + 249 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29322225 + 1065024 = 5415^2 + 1032^2 .

It is not a de Polignac number, because 30387249 - 2⁷ = 30387121 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30387349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45294 + ... + 45959.

It is an arithmetic number, because the mean of its divisors is an integer number (3756623).

Almost surely, 2^30387249 is an apocalyptic number.

It is an amenable number.

30387249 is a deficient number, since it is larger than the sum of its proper divisors (14692227).

30387249 is a wasteful number, since it uses less digits than its factorization.

30387249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91296 (or 91293 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 30387249 is about 5512.4630611007. The cubic root of 30387249 is about 312.0545084745.

The spelling of 30387249 in words is "thirty million, three hundred eighty-seven thousand, two hundred forty-nine".