390839073 has 8 divisors (see below), whose sum is σ = 528896928. Its totient is φ = 256670304.

The previous prime is 390839051. The next prime is 390839077. The reversal of 390839073 is 370938093.

It is a happy number.

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

It is not a de Polignac number, because 390839073 - 2²¹ = 388741921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390839077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972036 + ... + 972437.

It is an arithmetic number, because the mean of its divisors is an integer number (66112116).

Almost surely, 2^390839073 is an apocalyptic number.

It is an amenable number.

390839073 is a deficient number, since it is larger than the sum of its proper divisors (138057855).

390839073 is a wasteful number, since it uses less digits than its factorization.

390839073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944543.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 390839073 is about 19769.6503003973. The cubic root of 390839073 is about 731.1379468599.

The spelling of 390839073 in words is "three hundred ninety million, eight hundred thirty-nine thousand, seventy-three".