1408243644 has 30 divisors (see below), whose sum is σ = 3681427904. Its totient is φ = 469414440.

The previous prime is 1408243631. The next prime is 1408243673. The reversal of 1408243644 is 4463428041.

1408243644 is a `hidden beast` number, since 1 + 4 + 0 + 8 + 2 + 4 + 3 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1408243599 and 1408243608.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 2172892 + ... + 2173539.

Almost surely, 2^1408243644 is an apocalyptic number.

It is an amenable number.

1408243644 is an abundant number, since it is smaller than the sum of its proper divisors (2273184260).

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

1408243644 is a wasteful number, since it uses less digits than its factorization.

1408243644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346447 (or 4346436 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 1408243644 is about 37526.5725053595. The cubic root of 1408243644 is about 1120.8803781614.

The spelling of 1408243644 in words is "one billion, four hundred eight million, two hundred forty-three thousand, six hundred forty-four".