30742287 has 16 divisors (see below), whose sum is σ = 41720448. Its totient is φ = 20132640.

The previous prime is 30742259. The next prime is 30742303. The reversal of 30742287 is 78224703.

It is not a de Polignac number, because 30742287 - 2⁸ = 30742031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30742207) 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, 82233 + ... + 82605.

It is an arithmetic number, because the mean of its divisors is an integer number (2607528).

Almost surely, 2^30742287 is an apocalyptic number.

30742287 is a deficient number, since it is larger than the sum of its proper divisors (10978161).

30742287 is a wasteful number, since it uses less digits than its factorization.

30742287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 30742287 is about 5544.5727517997. The cubic root of 30742287 is about 313.2651314010.

The spelling of 30742287 in words is "thirty million, seven hundred forty-two thousand, two hundred eighty-seven".