390209001 has 72 divisors (see below), whose sum is σ = 665915040. Its totient is φ = 202535424.

The previous prime is 390208999. The next prime is 390209021. The reversal of 390209001 is 100902093.

It is a happy number.

It is not a de Polignac number, because 390209001 - 2¹ = 390208999 is a prime.

It is a super-2 number, since 2×390209001² = 304526128922836002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390209021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2807190 + ... + 2807328.

It is an arithmetic number, because the mean of its divisors is an integer number (9248820).

Almost surely, 2^390209001 is an apocalyptic number.

It is an amenable number.

390209001 is a deficient number, since it is larger than the sum of its proper divisors (275706039).

390209001 is a wasteful number, since it uses less digits than its factorization.

390209001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 390209001 is about 19753.7085378923. The cubic root of 390209001 is about 730.7448461775.

The spelling of 390209001 in words is "three hundred ninety million, two hundred nine thousand, one".