283431240 has 48 divisors (see below), whose sum is σ = 921152700. Its totient is φ = 75581568.

The previous prime is 283431229. The next prime is 283431251. The reversal of 283431240 is 42134382.

It is an interprime number because it is at equal distance from previous prime (283431229) and next prime (283431251).

It can be written as a sum of positive squares in 2 ways, for example, as 278422596 + 5008644 = 16686^2 + 2238^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393295 + ... + 394014.

Almost surely, 2^283431240 is an apocalyptic number.

283431240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

283431240 is an abundant number, since it is smaller than the sum of its proper divisors (637721460).

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

283431240 is a wasteful number, since it uses less digits than its factorization.

283431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787326 (or 787319 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 283431240 is about 16835.4162407705. The cubic root of 283431240 is about 656.8747563297.

The spelling of 283431240 in words is "two hundred eighty-three million, four hundred thirty-one thousand, two hundred forty".