647238748 has 24 divisors (see below), whose sum is σ = 1224357120. Its totient is φ = 297608640.

The previous prime is 647238737. The next prime is 647238763. The reversal of 647238748 is 847832746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9148 + ... + 37123.

It is an arithmetic number, because the mean of its divisors is an integer number (51014880).

Almost surely, 2^647238748 is an apocalyptic number.

It is an amenable number.

647238748 is a deficient number, since it is larger than the sum of its proper divisors (577118372).

647238748 is a wasteful number, since it uses less digits than its factorization.

647238748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46557 (or 46555 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The square root of 647238748 is about 25440.8873272927. The cubic root of 647238748 is about 865.0107466338.

The spelling of 647238748 in words is "six hundred forty-seven million, two hundred thirty-eight thousand, seven hundred forty-eight".