391652 has 12 divisors (see below), whose sum is σ = 690480. Its totient is φ = 194376.

The previous prime is 391639. The next prime is 391661. The reversal of 391652 is 256193.

It is an unprimeable number.

391652 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 3 ways as a sum of consecutive naturals, for example, 443 + ... + 989.

It is an arithmetic number, because the mean of its divisors is an integer number (57540).

2³⁹¹⁶⁵² is an apocalyptic number.

It is an amenable number.

391652 is a deficient number, since it is larger than the sum of its proper divisors (298828).

391652 is a wasteful number, since it uses less digits than its factorization.

391652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 728 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 391652 is about 625.8210606875. The cubic root of 391652 is about 73.1644506731.

The spelling of 391652 in words is "three hundred ninety-one thousand, six hundred fifty-two".