390742 has 8 divisors (see below), whose sum is σ = 639432. Its totient is φ = 177600.

The previous prime is 390739. The next prime is 390743. The reversal of 390742 is 247093.

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 (390743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8859 + ... + 8902.

It is an arithmetic number, because the mean of its divisors is an integer number (79929).

2³⁹⁰⁷⁴² is an apocalyptic number.

390742 is a deficient number, since it is larger than the sum of its proper divisors (248690).

390742 is a wasteful number, since it uses less digits than its factorization.

390742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17774.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 390742 is about 625.0935929923. The cubic root of 390742 is about 73.1077410751.

The spelling of 390742 in words is "three hundred ninety thousand, seven hundred forty-two".