30428247 has 16 divisors (see below), whose sum is σ = 41460480. Its totient is φ = 19844352.

The previous prime is 30428243. The next prime is 30428269. The reversal of 30428247 is 74282403.

It is not a de Polignac number, because 30428247 - 2² = 30428243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30428243) 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, 62238 + ... + 62724.

It is an arithmetic number, because the mean of its divisors is an integer number (2591280).

Almost surely, 2^30428247 is an apocalyptic number.

30428247 is a deficient number, since it is larger than the sum of its proper divisors (11032233).

30428247 is a wasteful number, since it uses less digits than its factorization.

30428247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 30428247 is about 5516.1804720295. The cubic root of 30428247 is about 312.1947850907.

The spelling of 30428247 in words is "thirty million, four hundred twenty-eight thousand, two hundred forty-seven".