1282645644 has 48 divisors (see below), whose sum is σ = 3447349248. Its totient is φ = 363581568.

The previous prime is 1282645643. The next prime is 1282645687. The reversal of 1282645644 is 4465462821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1282645596 and 1282645605.

It is not an unprimeable number, because it can be changed into a prime (1282645643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49449 + ... + 70784.

It is an arithmetic number, because the mean of its divisors is an integer number (71819776).

Almost surely, 2^1282645644 is an apocalyptic number.

1282645644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1282645644 is an abundant number, since it is smaller than the sum of its proper divisors (2164703604).

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

1282645644 is a wasteful number, since it uses less digits than its factorization.

1282645644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120374 (or 120372 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 1282645644 is about 35814.0425531662. The cubic root of 1282645644 is about 1086.5145925337.

The spelling of 1282645644 in words is "one billion, two hundred eighty-two million, six hundred forty-five thousand, six hundred forty-four".