1405400312 has 16 divisors (see below), whose sum is σ = 2642595840. Its totient is φ = 700708096.

The previous prime is 1405400281. The next prime is 1405400317. The reversal of 1405400312 is 2130045041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405400317) 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, 246008 + ... + 251655.

It is an arithmetic number, because the mean of its divisors is an integer number (165162240).

Almost surely, 2^1405400312 is an apocalyptic number.

It is an amenable number.

1405400312 is a deficient number, since it is larger than the sum of its proper divisors (1237195528).

1405400312 is a wasteful number, since it uses less digits than its factorization.

1405400312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498022 (or 498018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1405400312 is about 37488.6691148139. The cubic root of 1405400312 is about 1120.1254940163.

Adding to 1405400312 its reverse (2130045041), we get a palindrome (3535445353).

The spelling of 1405400312 in words is "one billion, four hundred five million, four hundred thousand, three hundred twelve".