1258640382 has 16 divisors (see below), whose sum is σ = 2518163712. Its totient is φ = 419399640.

The previous prime is 1258640381. The next prime is 1258640387. The reversal of 1258640382 is 2830468521.

It is a super-2 number, since 2×1258640382² = 3168351222402211848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1258640382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258640381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17478 + ... + 53129.

It is an arithmetic number, because the mean of its divisors is an integer number (157385232).

Almost surely, 2^1258640382 is an apocalyptic number.

1258640382 is an abundant number, since it is smaller than the sum of its proper divisors (1259523330).

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

1258640382 is a wasteful number, since it uses less digits than its factorization.

1258640382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73583.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 1258640382 is about 35477.3220804502. The cubic root of 1258640382 is about 1079.6936665485.

The spelling of 1258640382 in words is "one billion, two hundred fifty-eight million, six hundred forty thousand, three hundred eighty-two".