1400889 has 16 divisors (see below), whose sum is σ = 2247680. Its totient is φ = 758160.

The previous prime is 1400887. The next prime is 1400891. The reversal of 1400889 is 9880041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1400887) and next prime (1400891).

It is not a de Polignac number, because 1400889 - 2¹ = 1400887 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1400889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1400881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357 + ... + 2154.

It is an arithmetic number, because the mean of its divisors is an integer number (140480).

2^1400889 is an apocalyptic number.

1400889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1400889 is a deficient number, since it is larger than the sum of its proper divisors (846791).

1400889 is a wasteful number, since it uses less digits than its factorization.

1400889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1400889 is about 1183.5915680673. The cubic root of 1400889 is about 111.8925681138.

The spelling of 1400889 in words is "one million, four hundred thousand, eight hundred eighty-nine".