390740842 has 8 divisors (see below), whose sum is σ = 586350432. Its totient is φ = 195290700.

The previous prime is 390740803. The next prime is 390740881. The reversal of 390740842 is 248047093.

It is a happy number.

390740842 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (390740803) and next prime (390740881).

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

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, 33534 + ... + 43657.

It is an arithmetic number, because the mean of its divisors is an integer number (73293804).

Almost surely, 2^390740842 is an apocalyptic number.

390740842 is a deficient number, since it is larger than the sum of its proper divisors (195609590).

390740842 is a wasteful number, since it uses less digits than its factorization.

390740842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79724.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 390740842 is about 19767.1657553631. The cubic root of 390740842 is about 731.0766885447.

The spelling of 390740842 in words is "three hundred ninety million, seven hundred forty thousand, eight hundred forty-two".