30281285 has 8 divisors (see below), whose sum is σ = 37023480. Its totient is φ = 23767744.

The previous prime is 30281263. The next prime is 30281297. The reversal of 30281285 is 58218203.

It can be written as a sum of positive squares in 4 ways, for example, as 16008001 + 14273284 = 4001^2 + 3778^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30281285 - 2¹⁴ = 30264901 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56870 + ... + 57399.

It is an arithmetic number, because the mean of its divisors is an integer number (4627935).

Almost surely, 2^30281285 is an apocalyptic number.

It is an amenable number.

30281285 is a deficient number, since it is larger than the sum of its proper divisors (6742195).

30281285 is a wasteful number, since it uses less digits than its factorization.

30281285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114327.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 30281285 is about 5502.8433559388. The cubic root of 30281285 is about 311.6913621402.

Adding to 30281285 its reverse (58218203), we get a palindrome (88499488).

The spelling of 30281285 in words is "thirty million, two hundred eighty-one thousand, two hundred eighty-five".