1426440 has 32 divisors (see below), whose sum is σ = 4279680. Its totient is φ = 380352.

The previous prime is 1426429. The next prime is 1426457. The reversal of 1426440 is 446241.

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, 5824 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (133740).

2^1426440 is an apocalyptic number.

1426440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1426440 is an abundant number, since it is smaller than the sum of its proper divisors (2853240).

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

1426440 is a wasteful number, since it uses less digits than its factorization.

1426440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11901 (or 11897 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1426440 is about 1194.3366359616. The cubic root of 1426440 is about 112.5687481033.

The spelling of 1426440 in words is "one million, four hundred twenty-six thousand, four hundred forty".