1258435380 has 96 divisors (see below), whose sum is σ = 3571384320. Its totient is φ = 331067520.

The previous prime is 1258435361. The next prime is 1258435391. The reversal of 1258435380 is 835348521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1820835 + ... + 1821525.

It is an arithmetic number, because the mean of its divisors is an integer number (37201920).

Almost surely, 2^1258435380 is an apocalyptic number.

1258435380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258435380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785692160).

1258435380 is an abundant number, since it is smaller than the sum of its proper divisors (2312948940).

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

1258435380 is a wasteful number, since it uses less digits than its factorization.

1258435380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1258435380 is about 35474.4327650211. The cubic root of 1258435380 is about 1079.6350447260.

The spelling of 1258435380 in words is "one billion, two hundred fifty-eight million, four hundred thirty-five thousand, three hundred eighty".