1427736644 has 12 divisors (see below), whose sum is σ = 2511096000. Its totient is φ = 710280648.

The previous prime is 1427736641. The next prime is 1427736677. The reversal of 1427736644 is 4466377241.

It is a junction number, because it is equal to n+sod(n) for n = 1427736595 and 1427736604.

It is not an unprimeable number, because it can be changed into a prime (1427736641) 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 3 ways as a sum of consecutive naturals, for example, 896024 + ... + 897615.

It is an arithmetic number, because the mean of its divisors is an integer number (209258000).

Almost surely, 2^1427736644 is an apocalyptic number.

It is an amenable number.

1427736644 is a deficient number, since it is larger than the sum of its proper divisors (1083359356).

1427736644 is a wasteful number, since it uses less digits than its factorization.

1427736644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793842 (or 1793840 counting only the distinct ones).

The product of its digits is 677376, while the sum is 44.

The square root of 1427736644 is about 37785.4025253139. The cubic root of 1427736644 is about 1126.0284636834.

The spelling of 1427736644 in words is "one billion, four hundred twenty-seven million, seven hundred thirty-six thousand, six hundred forty-four".