30147256 has 16 divisors (see below), whose sum is σ = 59851440. Its totient is φ = 14186880.

The previous prime is 30147233. The next prime is 30147277. The reversal of 30147256 is 65274103.

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 3 ways as a sum of consecutive naturals, for example, 110700 + ... + 110971.

It is an arithmetic number, because the mean of its divisors is an integer number (3740715).

Almost surely, 2^30147256 is an apocalyptic number.

It is an amenable number.

30147256 is a deficient number, since it is larger than the sum of its proper divisors (29704184).

30147256 is a wasteful number, since it uses less digits than its factorization.

30147256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221694 (or 221690 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 30147256 is about 5490.6516917393. The cubic root of 30147256 is about 311.2308195037.

It can be divided in two parts, 30147 and 256, that added together give a palindrome (30403).

The spelling of 30147256 in words is "thirty million, one hundred forty-seven thousand, two hundred fifty-six".