1399588356820 has 24 divisors (see below), whose sum is σ = 2983003246944. Its totient is φ = 551479590816.

The previous prime is 1399588356799. The next prime is 1399588356821. The reversal of 1399588356820 is 286538859931.

It is a super-2 number, since 2×1399588356820² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399588356821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522233122 + ... + 522235801.

It is an arithmetic number, because the mean of its divisors is an integer number (124291801956).

Almost surely, 2^{1399588356820} is an apocalyptic number.

1399588356820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399588356820 is an abundant number, since it is smaller than the sum of its proper divisors (1583414890124).

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

1399588356820 is a wasteful number, since it uses less digits than its factorization.

1399588356820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044468999 (or 1044468997 counting only the distinct ones).

The product of its (nonzero) digits is 111974400, while the sum is 67.

The spelling of 1399588356820 in words is "one trillion, three hundred ninety-nine billion, five hundred eighty-eight million, three hundred fifty-six thousand, eight hundred twenty".