731008648 has 32 divisors (see below), whose sum is σ = 1398691800. Its totient is φ = 358046208.

The previous prime is 731008633. The next prime is 731008673. The reversal of 731008648 is 846800137.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 729972324 + 1036324 = 27018^2 + 1018^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437158 + ... + 438826.

Almost surely, 2^731008648 is an apocalyptic number.

It is an amenable number.

731008648 is a deficient number, since it is larger than the sum of its proper divisors (667683152).

731008648 is a wasteful number, since it uses less digits than its factorization.

731008648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 731008648 is about 27037.1715976357. The cubic root of 731008648 is about 900.8258460815.

The spelling of 731008648 in words is "seven hundred thirty-one million, eight thousand, six hundred forty-eight".