396240785 has 16 divisors (see below), whose sum is σ = 487247616. Its totient is φ = 309199488.

The previous prime is 396240781. The next prime is 396240787. The reversal of 396240785 is 587042693.

It is a cyclic number.

It is not a de Polignac number, because 396240785 - 2² = 396240781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396240781) 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, 70862 + ... + 76248.

It is an arithmetic number, because the mean of its divisors is an integer number (30452976).

Almost surely, 2^396240785 is an apocalyptic number.

It is an amenable number.

396240785 is a deficient number, since it is larger than the sum of its proper divisors (91006831).

396240785 is a wasteful number, since it uses less digits than its factorization.

396240785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 396240785 is about 19905.7977735131. The cubic root of 396240785 is about 734.4908532117.

The spelling of 396240785 in words is "three hundred ninety-six million, two hundred forty thousand, seven hundred eighty-five".