1404890 has 16 divisors (see below), whose sum is σ = 2597832. Its totient is φ = 546624.

The previous prime is 1404883. The next prime is 1404899. The reversal of 1404890 is 984041.

It can be written as a sum of positive squares in 4 ways, for example, as 994009 + 410881 = 997^2 + 641^2 .

It is not an unprimeable number, because it can be changed into a prime (1404899) 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, 1529 + ... + 2268.

2^1404890 is an apocalyptic number.

1404890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1404890 is a deficient number, since it is larger than the sum of its proper divisors (1192942).

1404890 is a wasteful number, since it uses less digits than its factorization.

1404890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1404890 is about 1185.2805575053. The cubic root of 1404890 is about 111.9989902120.

The spelling of 1404890 in words is "one million, four hundred four thousand, eight hundred ninety".