1326401404 has 24 divisors (see below), whose sum is σ = 2459258928. Its totient is φ = 623804160.

The previous prime is 1326401399. The next prime is 1326401407. The reversal of 1326401404 is 4041046231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326401407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126399 + ... + 136489.

It is an arithmetic number, because the mean of its divisors is an integer number (102469122).

Almost surely, 2^1326401404 is an apocalyptic number.

It is an amenable number.

1326401404 is a deficient number, since it is larger than the sum of its proper divisors (1132857524).

1326401404 is a wasteful number, since it uses less digits than its factorization.

1326401404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12045 (or 12043 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1326401404 is about 36419.7941235257. The cubic root of 1326401404 is about 1098.7317073751.

Adding to 1326401404 its reverse (4041046231), we get a palindrome (5367447635).

The spelling of 1326401404 in words is "one billion, three hundred twenty-six million, four hundred one thousand, four hundred four".