1400844 has 24 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 462160.

The previous prime is 1400821. The next prime is 1400863. The reversal of 1400844 is 4480041.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1400844.

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, 739 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^1400844 is an apocalyptic number.

It is an amenable number.

1400844 is an abundant number, since it is smaller than the sum of its proper divisors (1901364).

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

1400844 is a wasteful number, since it uses less digits than its factorization.

1400844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1400844 is about 1183.5725579786. The cubic root of 1400844 is about 111.8913700128.

Adding to 1400844 its reverse (4480041), we get a palindrome (5880885).

The spelling of 1400844 in words is "one million, four hundred thousand, eight hundred forty-four".