1409643840 has 224 divisors, whose sum is σ = 4924592640. Its totient is φ = 338790400.

The previous prime is 1409643821. The next prime is 1409643857. The reversal of 1409643840 is 483469041.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1382851 + ... + 1383869.

Almost surely, 2^1409643840 is an apocalyptic number.

1409643840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1409643840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462296320).

1409643840 is an abundant number, since it is smaller than the sum of its proper divisors (3514948800).

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

1409643840 is a wasteful number, since it uses less digits than its factorization.

1409643840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1409643840 is about 37545.2239306147. The cubic root of 1409643840 is about 1121.2517467463.

The spelling of 1409643840 in words is "one billion, four hundred nine million, six hundred forty-three thousand, eight hundred forty".