1401808 has 10 divisors (see below), whose sum is σ = 2716034. Its totient is φ = 700896.

The previous prime is 1401793. The next prime is 1401809. The reversal of 1401808 is 8081041.

It can be written as a sum of positive squares in only one way, i.e., 1373584 + 28224 = 1172^2 + 168^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43791 + ... + 43822.

2^1401808 is an apocalyptic number.

It is an amenable number.

1401808 is a deficient number, since it is larger than the sum of its proper divisors (1314226).

1401808 is an equidigital number, since it uses as much as digits as its factorization.

1401808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87621 (or 87615 counting only the distinct ones).

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

The square root of 1401808 is about 1183.9797295562. The cubic root of 1401808 is about 111.9170303880.

Adding to 1401808 its reverse (8081041), we get a palindrome (9482849).

It can be divided in two parts, 1401 and 808, that added together give a square (2209 = 47²).

The spelling of 1401808 in words is "one million, four hundred one thousand, eight hundred eight".