1420312440 has 32 divisors (see below), whose sum is σ = 4260937680. Its totient is φ = 378749952.

The previous prime is 1420312433. The next prime is 1420312457. The reversal of 1420312440 is 442130241.

1420312440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5917849 + ... + 5918088.

Almost surely, 2^1420312440 is an apocalyptic number.

1420312440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420312440 is an abundant number, since it is smaller than the sum of its proper divisors (2840625240).

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

1420312440 is a wasteful number, since it uses less digits than its factorization.

1420312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835951 (or 11835947 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1420312440 is about 37687.0327831736. The cubic root of 1420312440 is about 1124.0732951195.

Adding to 1420312440 its reverse (442130241), we get a palindrome (1862442681).

The spelling of 1420312440 in words is "one billion, four hundred twenty million, three hundred twelve thousand, four hundred forty".