1356401389 has 32 divisors (see below), whose sum is σ = 1720396800. Its totient is φ = 1064496384.

The previous prime is 1356401383. The next prime is 1356401411. The reversal of 1356401389 is 9831046531.

It is not a de Polignac number, because 1356401389 - 2³ = 1356401381 is a prime.

It is a super-2 number, since 2×1356401389² = 3679649456162258642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356401381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212604 + ... + 218890.

It is an arithmetic number, because the mean of its divisors is an integer number (53762400).

Almost surely, 2^1356401389 is an apocalyptic number.

It is an amenable number.

1356401389 is a deficient number, since it is larger than the sum of its proper divisors (363995411).

1356401389 is an equidigital number, since it uses as much as digits as its factorization.

1356401389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6362 (or 6348 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1356401389 is about 36829.3549902792. The cubic root of 1356401389 is about 1106.9535786049.

The spelling of 1356401389 in words is "one billion, three hundred fifty-six million, four hundred one thousand, three hundred eighty-nine".