390784942 has 8 divisors (see below), whose sum is σ = 586476936. Its totient is φ = 195292632.

The previous prime is 390784939. The next prime is 390784957. The reversal of 390784942 is 249487093.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 390784892 and 390784901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44928 + ... + 52915.

It is an arithmetic number, because the mean of its divisors is an integer number (73309617).

Almost surely, 2^390784942 is an apocalyptic number.

390784942 is a deficient number, since it is larger than the sum of its proper divisors (195691994).

390784942 is a wasteful number, since it uses less digits than its factorization.

390784942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99842.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 390784942 is about 19768.2812100597. The cubic root of 390784942 is about 731.1041912316.

The spelling of 390784942 in words is "three hundred ninety million, seven hundred eighty-four thousand, nine hundred forty-two".