1400740 has 24 divisors (see below), whose sum is σ = 3209472. Its totient is φ = 509280.

The previous prime is 1400731. The next prime is 1400747. The reversal of 1400740 is 470041.

It is a happy number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1400747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2964 + ... + 3403.

It is an arithmetic number, because the mean of its divisors is an integer number (133728).

2^1400740 is an apocalyptic number.

1400740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400740 is an abundant number, since it is smaller than the sum of its proper divisors (1808732).

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

1400740 is a wasteful number, since it uses less digits than its factorization.

1400740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 1400740 is about 1183.5286223831. The cubic root of 1400740 is about 111.8886009701. Note that the first 3 decimals are identical.

Adding to 1400740 its reverse (470041), we get a palindrome (1870781).

The spelling of 1400740 in words is "one million, four hundred thousand, seven hundred forty".