647464 has 8 divisors (see below), whose sum is σ = 1214010. Its totient is φ = 323728.

The previous prime is 647453. The next prime is 647477. The reversal of 647464 is 464746.

It can be written as a sum of positive squares in only one way, i.e., 574564 + 72900 = 758^2 + 270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459 + ... + 40474.

2⁶⁴⁷⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

647464 is a deficient number, since it is larger than the sum of its proper divisors (566546).

647464 is a wasteful number, since it uses less digits than its factorization.

647464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80939 (or 80935 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 647464 is about 804.6514773490. The cubic root of 647464 is about 86.5111081996.

It can be divided in two parts, 647 and 464, that added together give a palindrome (1111).

The spelling of 647464 in words is "six hundred forty-seven thousand, four hundred sixty-four".