1404816861 has 12 divisors (see below), whose sum is σ = 2140935072. Its totient is φ = 802654344.

The previous prime is 1404816817. The next prime is 1404816893. The reversal of 1404816861 is 1686184041.

It is not a de Polignac number, because 1404816861 - 2¹⁰ = 1404815837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404816461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167670 + ... + 175848.

It is an arithmetic number, because the mean of its divisors is an integer number (178411256).

Almost surely, 2^1404816861 is an apocalyptic number.

It is an amenable number.

1404816861 is a deficient number, since it is larger than the sum of its proper divisors (736118211).

1404816861 is an frugal number, since it uses more digits than its factorization.

1404816861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368 (or 8189 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1404816861 is about 37480.8866090438. The cubic root of 1404816861 is about 1119.9704661111.

The spelling of 1404816861 in words is "one billion, four hundred four million, eight hundred sixteen thousand, eight hundred sixty-one".