283640427 has 64 divisors (see below), whose sum is σ = 520565760. Its totient is φ = 148925952.

The previous prime is 283640411. The next prime is 283640443. The reversal of 283640427 is 724046382.

283640427 is a `hidden beast` number, since 2 + 8 + 3 + 640 + 4 + 2 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (283640411) and next prime (283640443).

It is not a de Polignac number, because 283640427 - 2⁴ = 283640411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 283640391 and 283640400.

It is not an unprimeable number, because it can be changed into a prime (283640407) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 137133 + ... + 139185.

It is an arithmetic number, because the mean of its divisors is an integer number (8133840).

Almost surely, 2^283640427 is an apocalyptic number.

283640427 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

283640427 is a deficient number, since it is larger than the sum of its proper divisors (236925333).

283640427 is a wasteful number, since it uses less digits than its factorization.

283640427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 283640427 is about 16841.6278013736. The cubic root of 283640427 is about 657.0363191699.

The spelling of 283640427 in words is "two hundred eighty-three million, six hundred forty thousand, four hundred twenty-seven".