1404490138 has 4 divisors (see below), whose sum is σ = 2106735210. Its totient is φ = 702245068.

The previous prime is 1404490133. The next prime is 1404490151. The reversal of 1404490138 is 8310944041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8310944041 = 62827 ⋅132283.

It can be written as a sum of positive squares in only one way, i.e., 1063607769 + 340882369 = 32613^2 + 18463^2 .

It is not an unprimeable number, because it can be changed into a prime (1404490133) 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 as a sum of consecutive naturals, namely, 351122533 + ... + 351122536.

Almost surely, 2^1404490138 is an apocalyptic number.

1404490138 is a deficient number, since it is larger than the sum of its proper divisors (702245072).

1404490138 is an equidigital number, since it uses as much as digits as its factorization.

1404490138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702245071.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1404490138 is about 37476.5278274282. The cubic root of 1404490138 is about 1119.8836342751.

The spelling of 1404490138 in words is "one billion, four hundred four million, four hundred ninety thousand, one hundred thirty-eight".