1405644413 has 8 divisors (see below), whose sum is σ = 1456402680. Its totient is φ = 1355038720.

The previous prime is 1405644349. The next prime is 1405644421. The reversal of 1405644413 is 3144465041.

It can be written as a sum of positive squares in 4 ways, for example, as 340144249 + 1065500164 = 18443^2 + 32642^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1405644413 - 2⁶ = 1405644349 is a prime.

It is a super-2 number, since 2×1405644413² = 3951672431596229138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405644413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405644113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19220 + ... + 56397.

It is an arithmetic number, because the mean of its divisors is an integer number (182050335).

Almost surely, 2^1405644413 is an apocalyptic number.

It is an amenable number.

1405644413 is a deficient number, since it is larger than the sum of its proper divisors (50758267).

1405644413 is an equidigital number, since it uses as much as digits as its factorization.

1405644413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76287.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1405644413 is about 37491.9246371802. The cubic root of 1405644413 is about 1120.1903410027.

The spelling of 1405644413 in words is "one billion, four hundred five million, six hundred forty-four thousand, four hundred thirteen".