30668253 has 16 divisors (see below), whose sum is σ = 50981376. Its totient is φ = 15931440.

The previous prime is 30668213. The next prime is 30668273. The reversal of 30668253 is 35286603.

It is not a de Polignac number, because 30668253 - 2⁶ = 30668189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30668213) 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, 66151 + ... + 66612.

It is an arithmetic number, because the mean of its divisors is an integer number (3186336).

Almost surely, 2^30668253 is an apocalyptic number.

30668253 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30668253 is a deficient number, since it is larger than the sum of its proper divisors (20313123).

30668253 is a wasteful number, since it uses less digits than its factorization.

30668253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132784.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 30668253 is about 5537.8924691619. The cubic root of 30668253 is about 313.0134594613.

The spelling of 30668253 in words is "thirty million, six hundred sixty-eight thousand, two hundred fifty-three".