391492 has 12 divisors (see below), whose sum is σ = 692860. Its totient is φ = 193536.

The previous prime is 391487. The next prime is 391519. The reversal of 391492 is 294193.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 244036 = 384^2 + 494^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 391492.

It is an unprimeable number.

391492 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, 117 + ... + 892.

2³⁹¹⁴⁹² is an apocalyptic number.

It is an amenable number.

391492 is a deficient number, since it is larger than the sum of its proper divisors (301368).

391492 is a wasteful number, since it uses less digits than its factorization.

391492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1108 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 391492 is about 625.6932155617. The cubic root of 391492 is about 73.1544861242.

The spelling of 391492 in words is "three hundred ninety-one thousand, four hundred ninety-two".