1238835258 has 96 divisors (see below), whose sum is σ = 2837330496. Its totient is φ = 390230784.

The previous prime is 1238835251. The next prime is 1238835263. The reversal of 1238835258 is 8525388321.

1238835258 is a `hidden beast` number, since 12 + 38 + 83 + 525 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1238835251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4035141 + ... + 4035447.

It is an arithmetic number, because the mean of its divisors is an integer number (29555526).

Almost surely, 2^1238835258 is an apocalyptic number.

1238835258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238835258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418665248).

1238835258 is an abundant number, since it is smaller than the sum of its proper divisors (1598495238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1238835258 is a wasteful number, since it uses less digits than its factorization.

1238835258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 505 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 1238835258 is about 35197.0916128023. The cubic root of 1238835258 is about 1074.0005877882. Note that the first 3 decimals are identical.

The spelling of 1238835258 in words is "one billion, two hundred thirty-eight million, eight hundred thirty-five thousand, two hundred fifty-eight".