1406340 has 72 divisors (see below), whose sum is σ = 4601688. Its totient is φ = 345600.

The previous prime is 1406311. The next prime is 1406351. The reversal of 1406340 is 436041.

It can be written as a sum of positive squares in 4 ways, for example, as 133956 + 1272384 = 366^2 + 1128^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2040 + ... + 2640.

2^1406340 is an apocalyptic number.

1406340 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 1406340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2300844).

1406340 is an abundant number, since it is smaller than the sum of its proper divisors (3195348).

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

1406340 is a wasteful number, since it uses less digits than its factorization.

1406340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1406340 is about 1185.8920692879. The cubic root of 1406340 is about 112.0375086955.

Subtracting from 1406340 its reverse (436041), we obtain a cube (970299 = 99³).

The spelling of 1406340 in words is "one million, four hundred six thousand, three hundred forty".