1430140240 has 20 divisors (see below), whose sum is σ = 3325076244. Its totient is φ = 572056064.

The previous prime is 1430140237. The next prime is 1430140247. The reversal of 1430140240 is 420410341.

It can be written as a sum of positive squares in 2 ways, for example, as 299566864 + 1130573376 = 17308^2 + 33624^2 .

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

It is a super-2 number, since 2×1430140240² = 4090602212134515200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1430140247) 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, 8938297 + ... + 8938456.

Almost surely, 2^1430140240 is an apocalyptic number.

1430140240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1430140240 is an abundant number, since it is smaller than the sum of its proper divisors (1894936004).

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

1430140240 is a wasteful number, since it uses less digits than its factorization.

1430140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17876766 (or 17876760 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1430140240 is about 37817.1950308322. The cubic root of 1430140240 is about 1126.6599994159.

Adding to 1430140240 its reverse (420410341), we get a palindrome (1850550581).

The spelling of 1430140240 in words is "one billion, four hundred thirty million, one hundred forty thousand, two hundred forty".