1406402740 has 12 divisors (see below), whose sum is σ = 2953445796. Its totient is φ = 562561088.

The previous prime is 1406402737. The next prime is 1406402749. The reversal of 1406402740 is 472046041.

It can be written as a sum of positive squares in 2 ways, for example, as 198979236 + 1207423504 = 14106^2 + 34748^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1406402699 and 1406402708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406402749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35160049 + ... + 35160088.

It is an arithmetic number, because the mean of its divisors is an integer number (246120483).

Almost surely, 2^1406402740 is an apocalyptic number.

1406402740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1406402740 is an abundant number, since it is smaller than the sum of its proper divisors (1547043056).

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

1406402740 is a wasteful number, since it uses less digits than its factorization.

1406402740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70320146 (or 70320144 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1406402740 is about 37502.0364780368. The cubic root of 1406402740 is about 1120.3917475270.

Adding to 1406402740 its reverse (472046041), we get a palindrome (1878448781).

It can be divided in two parts, 140640 and 2740, that added together give a triangular number (143380 = T₅₃₅).

The spelling of 1406402740 in words is "one billion, four hundred six million, four hundred two thousand, seven hundred forty".