1405818444 has 48 divisors (see below), whose sum is σ = 3341063936. Its totient is φ = 459950400.

The previous prime is 1405818437. The next prime is 1405818461. The reversal of 1405818444 is 4448185041.

It is a happy number.

It is a super-2 number, since 2×1405818444² = 3952650994981162272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398649 + ... + 402159.

Almost surely, 2^1405818444 is an apocalyptic number.

It is an amenable number.

1405818444 is an abundant number, since it is smaller than the sum of its proper divisors (1935245492).

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

1405818444 is a wasteful number, since it uses less digits than its factorization.

1405818444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126 (or 4124 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 1405818444 is about 37494.2454784731. The cubic root of 1405818444 is about 1120.2365688629.

The spelling of 1405818444 in words is "one billion, four hundred five million, eight hundred eighteen thousand, four hundred forty-four".