1358123680 has 48 divisors (see below), whose sum is σ = 3212372520. Its totient is φ = 542605312.

The previous prime is 1358123639. The next prime is 1358123707. The reversal of 1358123680 is 863218531.

It can be written as a sum of positive squares in 4 ways, for example, as 249766416 + 1108357264 = 15804^2 + 33292^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144072 + ... + 153208.

Almost surely, 2^1358123680 is an apocalyptic number.

1358123680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1358123680 is an abundant number, since it is smaller than the sum of its proper divisors (1854248840).

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

1358123680 is an equidigital number, since it uses as much as digits as its factorization.

1358123680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081 (or 10073 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1358123680 is about 36852.7296139648. The cubic root of 1358123680 is about 1107.4218986380.

The spelling of 1358123680 in words is "one billion, three hundred fifty-eight million, one hundred twenty-three thousand, six hundred eighty".