1409440 has 48 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 537856.

The previous prime is 1409407. The next prime is 1409459. The reversal of 1409440 is 449041.

It is a happy number.

It is a super-2 number, since 2×1409440² = 3973042227200, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489 + ... + 3871.

It is an arithmetic number, because the mean of its divisors is an integer number (72576).

2^1409440 is an apocalyptic number.

1409440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1409440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741824).

1409440 is an abundant number, since it is smaller than the sum of its proper divisors (2074208).

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

1409440 is a wasteful number, since it uses less digits than its factorization.

1409440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1409440 is about 1187.1983827482. The cubic root of 1409440 is about 112.1197698348.

It can be divided in two parts, 1409 and 440, that added together give a square (1849 = 43²).

The spelling of 1409440 in words is "one million, four hundred nine thousand, four hundred forty".