1258129808 has 80 divisors (see below), whose sum is σ = 2750240640. Its totient is φ = 553208832.

The previous prime is 1258129787. The next prime is 1258129811. The reversal of 1258129808 is 8089218521.

It is a super-2 number, since 2×1258129808² = 3165781227556233728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956335 + ... + 1956977.

It is an arithmetic number, because the mean of its divisors is an integer number (34378008).

Almost surely, 2^1258129808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258129808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375120320).

1258129808 is an abundant number, since it is smaller than the sum of its proper divisors (1492110832).

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

1258129808 is a wasteful number, since it uses less digits than its factorization.

1258129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 44.

The square root of 1258129808 is about 35470.1255706827. The cubic root of 1258129808 is about 1079.5476523574.

The spelling of 1258129808 in words is "one billion, two hundred fifty-eight million, one hundred twenty-nine thousand, eight hundred eight".