30387056 has 60 divisors (see below), whose sum is σ = 69294672. Its totient is φ = 12907776.

The previous prime is 30387017. The next prime is 30387079. The reversal of 30387056 is 65078303.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268856 + ... + 268968.

Almost surely, 2^30387056 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 30387056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34647336).

30387056 is an abundant number, since it is smaller than the sum of its proper divisors (38907616).

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

30387056 is an frugal number, since it uses more digits than its factorization.

30387056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 30387056 is about 5512.4455552867. The cubic root of 30387056 is about 312.0538478175.

The spelling of 30387056 in words is "thirty million, three hundred eighty-seven thousand, fifty-six".