1801408 has 28 divisors (see below), whose sum is σ = 4086352. Its totient is φ = 771840.

The previous prime is 1801403. The next prime is 1801411. The reversal of 1801408 is 8041081.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (1801403) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1563 + ... + 2458.

2^1801408 is an apocalyptic number.

It is an amenable number.

1801408 is an abundant number, since it is smaller than the sum of its proper divisors (2284944).

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

1801408 is an equidigital number, since it uses as much as digits as its factorization.

1801408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040 (or 4030 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1801408 is about 1342.1654145447. The cubic root of 1801408 is about 121.6757492021.

Adding to 1801408 its reverse (8041081), we get a palindrome (9842489).

It can be divided in two parts, 1801 and 408, that added together give a square (2209 = 47²).

The spelling of 1801408 in words is "one million, eight hundred one thousand, four hundred eight".