1283474240 has 28 divisors (see below), whose sum is σ = 3056273796. Its totient is φ = 513389568.

The previous prime is 1283474233. The next prime is 1283474243. The reversal of 1283474240 is 424743821.

It can be written as a sum of positive squares in 2 ways, for example, as 650046016 + 633428224 = 25496^2 + 25168^2 .

It is a super-2 number, since 2×1283474240² = 3294612249487155200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1283474240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283474243) 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, 2005109 + ... + 2005748.

Almost surely, 2^1283474240 is an apocalyptic number.

1283474240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283474240 is an abundant number, since it is smaller than the sum of its proper divisors (1772799556).

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

1283474240 is an equidigital number, since it uses as much as digits as its factorization.

1283474240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010874 (or 4010864 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 1283474240 is about 35825.6087177873. The cubic root of 1283474240 is about 1086.7485069321.

The spelling of 1283474240 in words is "one billion, two hundred eighty-three million, four hundred seventy-four thousand, two hundred forty".