647392 has 12 divisors (see below), whose sum is σ = 1274616. Its totient is φ = 323680.

The previous prime is 647371. The next prime is 647399. The reversal of 647392 is 293746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10084 + ... + 10147.

It is an arithmetic number, because the mean of its divisors is an integer number (106218).

2⁶⁴⁷³⁹² is an apocalyptic number.

It is an amenable number.

647392 is a deficient number, since it is larger than the sum of its proper divisors (627224).

647392 is a wasteful number, since it uses less digits than its factorization.

647392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20241 (or 20233 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 647392 is about 804.6067362383. The cubic root of 647392 is about 86.5079013131.

The spelling of 647392 in words is "six hundred forty-seven thousand, three hundred ninety-two".