283912640 has 56 divisors (see below), whose sum is σ = 737536752. Its totient is φ = 103239680.

The previous prime is 283912609. The next prime is 283912693. The reversal of 283912640 is 46219382.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 283912640.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 36809 + ... + 43848.

Almost surely, 2^283912640 is an apocalyptic number.

283912640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

283912640 is an abundant number, since it is smaller than the sum of its proper divisors (453624112).

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

283912640 is a wasteful number, since it uses less digits than its factorization.

283912640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80685 (or 80675 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 283912640 is about 16849.7074158574. The cubic root of 283912640 is about 657.2464404184.

The spelling of 283912640 in words is "two hundred eighty-three million, nine hundred twelve thousand, six hundred forty".