30857948 has 24 divisors (see below), whose sum is σ = 59881584. Its totient is φ = 13795200.

The previous prime is 30857947. The next prime is 30857951. The reversal of 30857948 is 84975803.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 30857899 and 30857908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30857947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3065 + ... + 8432.

It is an arithmetic number, because the mean of its divisors is an integer number (2495066).

Almost surely, 2^30857948 is an apocalyptic number.

It is an amenable number.

30857948 is a deficient number, since it is larger than the sum of its proper divisors (29023636).

30857948 is a wasteful number, since it uses less digits than its factorization.

30857948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11573 (or 11571 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 30857948 is about 5554.9930693026. The cubic root of 30857948 is about 313.6575031432.

The spelling of 30857948 in words is "thirty million, eight hundred fifty-seven thousand, nine hundred forty-eight".