647948 has 24 divisors (see below), whose sum is σ = 1317792. Its totient is φ = 273024.

The previous prime is 647917. The next prime is 647951. The reversal of 647948 is 849746.

It is a happy number.

It is a super-2 number, since 2×647948² = 839673221408, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647948.

It is an unprimeable number.

647948 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886 + ... + 2202.

It is an arithmetic number, because the mean of its divisors is an integer number (54908).

2⁶⁴⁷⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

647948 is an abundant number, since it is smaller than the sum of its proper divisors (669844).

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

647948 is a wasteful number, since it uses less digits than its factorization.

647948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 647948 is about 804.9521724923. The cubic root of 647948 is about 86.5326594350.

The spelling of 647948 in words is "six hundred forty-seven thousand, nine hundred forty-eight".