30257250 has 32 divisors (see below), whose sum is σ = 75523968. Its totient is φ = 8068400.

The previous prime is 30257243. The next prime is 30257257. The reversal of 30257250 is 5275203.

It is an interprime number because it is at equal distance from previous prime (30257243) and next prime (30257257).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30257250.

It is not an unprimeable number, because it can be changed into a prime (30257257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19422 + ... + 20921.

It is an arithmetic number, because the mean of its divisors is an integer number (2360124).

Almost surely, 2^30257250 is an apocalyptic number.

30257250 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30257250 is an abundant number, since it is smaller than the sum of its proper divisors (45266718).

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

30257250 is a wasteful number, since it uses less digits than its factorization.

30257250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40363 (or 40353 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 30257250 is about 5500.6590514228. The cubic root of 30257250 is about 311.6088746145.

The spelling of 30257250 in words is "thirty million, two hundred fifty-seven thousand, two hundred fifty".