30718285 has 12 divisors (see below), whose sum is σ = 39916692. Its totient is φ = 22683648.

The previous prime is 30718283. The next prime is 30718313. The reversal of 30718285 is 58281703.

It can be written as a sum of positive squares in 6 ways, for example, as 9012004 + 21706281 = 3002^2 + 4659^2 .

It is not a de Polignac number, because 30718285 - 2¹ = 30718283 is a prime.

It is a super-2 number, since 2×30718285² = 1887226066682450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30718285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30718283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17332 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (3326391).

Almost surely, 2^30718285 is an apocalyptic number.

It is an amenable number.

30718285 is a deficient number, since it is larger than the sum of its proper divisors (9198407).

30718285 is a wasteful number, since it uses less digits than its factorization.

30718285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36384 (or 36371 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 30718285 is about 5542.4078702311. The cubic root of 30718285 is about 313.1835830618.

Adding to 30718285 its reverse (58281703), we get a palindrome (88999988).

The spelling of 30718285 in words is "thirty million, seven hundred eighteen thousand, two hundred eighty-five".