30040257 has 24 divisors (see below), whose sum is σ = 43738464. Its totient is φ = 18330624.

The previous prime is 30040253. The next prime is 30040261. The reversal of 30040257 is 75204003.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30040253) and next prime (30040261).

It is not a de Polignac number, because 30040257 - 2² = 30040253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30040253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97698 + ... + 98004.

It is an arithmetic number, because the mean of its divisors is an integer number (1822436).

Almost surely, 2^30040257 is an apocalyptic number.

It is an amenable number.

30040257 is a deficient number, since it is larger than the sum of its proper divisors (13698207).

30040257 is a wasteful number, since it uses less digits than its factorization.

30040257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 30040257 is about 5480.8992875257. The cubic root of 30040257 is about 310.8621749830.

The spelling of 30040257 in words is "thirty million, forty thousand, two hundred fifty-seven".