396543890 has 8 divisors (see below), whose sum is σ = 713779020. Its totient is φ = 158617552.

The previous prime is 396543881. The next prime is 396543899. The reversal of 396543890 is 98345693.

It is an interprime number because it is at equal distance from previous prime (396543881) and next prime (396543899).

It can be written as a sum of positive squares in 2 ways, for example, as 324684361 + 71859529 = 18019^2 + 8477^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (396543899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19827185 + ... + 19827204.

Almost surely, 2^396543890 is an apocalyptic number.

396543890 is a deficient number, since it is larger than the sum of its proper divisors (317235130).

396543890 is a wasteful number, since it uses less digits than its factorization.

396543890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39654396.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 396543890 is about 19913.4098034465. The cubic root of 396543890 is about 734.6780887816.

The spelling of 396543890 in words is "three hundred ninety-six million, five hundred forty-three thousand, eight hundred ninety".