396783905 has 8 divisors (see below), whose sum is σ = 544160832. Its totient is φ = 272080368.

The previous prime is 396783901. The next prime is 396783923. The reversal of 396783905 is 509387693.

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

It is not a de Polignac number, because 396783905 - 2² = 396783901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396783901) 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, 5668307 + ... + 5668376.

It is an arithmetic number, because the mean of its divisors is an integer number (68020104).

Almost surely, 2^396783905 is an apocalyptic number.

396783905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

396783905 is a deficient number, since it is larger than the sum of its proper divisors (147376927).

396783905 is a wasteful number, since it uses less digits than its factorization.

396783905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11336695.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 396783905 is about 19919.4353584634. The cubic root of 396783905 is about 734.8262843968.

The spelling of 396783905 in words is "three hundred ninety-six million, seven hundred eighty-three thousand, nine hundred five".