1440378 has 12 divisors (see below), whose sum is σ = 3120858. Its totient is φ = 480120.

The previous prime is 1440349. The next prime is 1440379. The reversal of 1440378 is 8730441.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 7569 = 1197^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (1440379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39993 + ... + 40028.

2^1440378 is an apocalyptic number.

1440378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1440378 is an abundant number, since it is smaller than the sum of its proper divisors (1680480).

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

1440378 is a wasteful number, since it uses less digits than its factorization.

1440378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80029 (or 80026 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1440378 is about 1200.1574896654. The cubic root of 1440378 is about 112.9342034796.

The spelling of 1440378 in words is "one million, four hundred forty thousand, three hundred seventy-eight".