390640901 has 8 divisors (see below), whose sum is σ = 465857664. Its totient is φ = 320276880.

The previous prime is 390640879. The next prime is 390640903. The reversal of 390640901 is 109046093.

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

It is not a de Polignac number, because 390640901 - 2⁶ = 390640837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390640903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213010 + ... + 1213331.

It is an arithmetic number, because the mean of its divisors is an integer number (58232208).

Almost surely, 2^390640901 is an apocalyptic number.

It is an amenable number.

390640901 is a deficient number, since it is larger than the sum of its proper divisors (75216763).

390640901 is a wasteful number, since it uses less digits than its factorization.

390640901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426371.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 390640901 is about 19764.6376389753. The cubic root of 390640901 is about 731.0143533106.

Adding to 390640901 its reverse (109046093), we get a palindrome (499686994).

The spelling of 390640901 in words is "three hundred ninety million, six hundred forty thousand, nine hundred one".