390049639 has 16 divisors (see below), whose sum is σ = 450666496. Its totient is φ = 330674400.

The previous prime is 390049609. The next prime is 390049691. The reversal of 390049639 is 936940093.

It is a happy number.

It is not a de Polignac number, because 390049639 - 2⁵ = 390049607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390049595 and 390049604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390049609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480544 + ... + 481354.

It is an arithmetic number, because the mean of its divisors is an integer number (28166656).

Almost surely, 2^390049639 is an apocalyptic number.

390049639 is a deficient number, since it is larger than the sum of its proper divisors (60616857).

390049639 is a wasteful number, since it uses less digits than its factorization.

390049639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 390049639 is about 19749.6744023794. The cubic root of 390049639 is about 730.6453534982.

The spelling of 390049639 in words is "three hundred ninety million, forty-nine thousand, six hundred thirty-nine".