30808253 has 16 divisors (see below), whose sum is σ = 37931520. Its totient is φ = 24430896.

The previous prime is 30808223. The next prime is 30808259. The reversal of 30808253 is 35280803.

30808253 = 707² + 708² + ... + 763².

It is not a de Polignac number, because 30808253 - 2¹⁰ = 30807229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30808259) 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, 3026 + ... + 8412.

It is an arithmetic number, because the mean of its divisors is an integer number (2370720).

Almost surely, 2^30808253 is an apocalyptic number.

It is an amenable number.

30808253 is a deficient number, since it is larger than the sum of its proper divisors (7123267).

30808253 is a wasteful number, since it uses less digits than its factorization.

30808253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30808253 is about 5550.5182640903. The cubic root of 30808253 is about 313.4890367181.

The spelling of 30808253 in words is "thirty million, eight hundred eight thousand, two hundred fifty-three".