1801693404 has 72 divisors (see below), whose sum is σ = 5216964480. Its totient is φ = 513575712.

The previous prime is 1801693403. The next prime is 1801693409. The reversal of 1801693404 is 4043961081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801693403) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 103567 + ... + 119705.

It is an arithmetic number, because the mean of its divisors is an integer number (72457840).

Almost surely, 2^1801693404 is an apocalyptic number.

1801693404 is a gapful number since it is divisible by the number (14) 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 1801693404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2608482240).

1801693404 is an abundant number, since it is smaller than the sum of its proper divisors (3415271076).

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

1801693404 is a wasteful number, since it uses less digits than its factorization.

1801693404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16599 (or 16594 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1801693404 is about 42446.3591371510. The cubic root of 1801693404 is about 1216.8217471510.

The spelling of 1801693404 in words is "one billion, eight hundred one million, six hundred ninety-three thousand, four hundred four".