283040940 has 96 divisors (see below), whose sum is σ = 975421440. Its totient is φ = 59717376.

The previous prime is 283040911. The next prime is 283040941. The reversal of 283040940 is 49040382.

It is a happy number.

It is a super-2 number, since 2×283040940² = 160224347432167200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 283040898 and 283040907.

It is not an unprimeable number, because it can be changed into a prime (283040941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20460 + ... + 31379.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2^283040940 is an apocalyptic number.

283040940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

283040940 is an abundant number, since it is smaller than the sum of its proper divisors (692380500).

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

283040940 is a wasteful number, since it uses less digits than its factorization.

283040940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51871 (or 51869 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 283040940 is about 16823.8206124530. The cubic root of 283040940 is about 656.5731005799.

The spelling of 283040940 in words is "two hundred eighty-three million, forty thousand, nine hundred forty".