392642 has 8 divisors (see below), whose sum is σ = 593676. Its totient is φ = 194752.

The previous prime is 392629. The next prime is 392647. The reversal of 392642 is 246293.

It can be written as a sum of positive squares in 2 ways, for example, as 373321 + 19321 = 611^2 + 139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392647) by changing a digit.

392642 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 + ... + 990.

2³⁹²⁶⁴² is an apocalyptic number.

392642 is a deficient number, since it is larger than the sum of its proper divisors (201034).

392642 is a wasteful number, since it uses less digits than its factorization.

392642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572.

The product of its digits is 2592, while the sum is 26.

The square root of 392642 is about 626.6115223965. The cubic root of 392642 is about 73.2260460528.

The spelling of 392642 in words is "three hundred ninety-two thousand, six hundred forty-two".