30857148 has 36 divisors (see below), whose sum is σ = 89143600. Its totient is φ = 8816256.

The previous prime is 30857147. The next prime is 30857153. The reversal of 30857148 is 84175803.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30857147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60973 + ... + 61476.

Almost surely, 2^30857148 is an apocalyptic number.

It is an amenable number.

30857148 is an abundant number, since it is smaller than the sum of its proper divisors (58286452).

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

30857148 is a wasteful number, since it uses less digits than its factorization.

30857148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122466 (or 122461 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 30857148 is about 5554.9210615453. The cubic root of 30857148 is about 313.6547925701.

The spelling of 30857148 in words is "thirty million, eight hundred fifty-seven thousand, one hundred forty-eight".