1402343440 has 20 divisors (see below), whose sum is σ = 3260448684. Its totient is φ = 560937344.

The previous prime is 1402343399. The next prime is 1402343441. The reversal of 1402343440 is 443432041.

It can be written as a sum of positive squares in 2 ways, for example, as 163021824 + 1239321616 = 12768^2 + 35204^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1402343440² = 3933134247422067200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1402343441) 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, 8764567 + ... + 8764726.

Almost surely, 2^1402343440 is an apocalyptic number.

1402343440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402343440 is an abundant number, since it is smaller than the sum of its proper divisors (1858105244).

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

1402343440 is a wasteful number, since it uses less digits than its factorization.

1402343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529306 (or 17529300 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1402343440 is about 37447.8763082768. The cubic root of 1402343440 is about 1119.3127799460.

Adding to 1402343440 its reverse (443432041), we get a palindrome (1845775481).

The spelling of 1402343440 in words is "one billion, four hundred two million, three hundred forty-three thousand, four hundred forty".