1238820253 has 16 divisors (see below), whose sum is σ = 1362696192. Its totient is φ = 1116864000.

The previous prime is 1238820241. The next prime is 1238820259. The reversal of 1238820253 is 3520288321.

It is a cyclic number.

It is not a de Polignac number, because 1238820253 - 2⁵ = 1238820221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238820259) 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, 744100 + ... + 745762.

It is an arithmetic number, because the mean of its divisors is an integer number (85168512).

Almost surely, 2^1238820253 is an apocalyptic number.

It is an amenable number.

1238820253 is a deficient number, since it is larger than the sum of its proper divisors (123875939).

1238820253 is a wasteful number, since it uses less digits than its factorization.

1238820253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1238820253 is about 35196.8784553403. The cubic root of 1238820253 is about 1073.9962516067.

The spelling of 1238820253 in words is "one billion, two hundred thirty-eight million, eight hundred twenty thousand, two hundred fifty-three".