396340489 has 4 divisors (see below), whose sum is σ = 396524560. Its totient is φ = 396156420.

The previous prime is 396340453. The next prime is 396340507. The reversal of 396340489 is 984043693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984043693 = 263 ⋅3741611.

It is a cyclic number.

It is not a de Polignac number, because 396340489 - 2¹⁷ = 396209417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396340429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88767 + ... + 93124.

It is an arithmetic number, because the mean of its divisors is an integer number (99131140).

Almost surely, 2^396340489 is an apocalyptic number.

It is an amenable number.

396340489 is a deficient number, since it is larger than the sum of its proper divisors (184071).

396340489 is a wasteful number, since it uses less digits than its factorization.

396340489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184070.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 396340489 is about 19908.3020119748. The cubic root of 396340489 is about 734.5524534115.

The spelling of 396340489 in words is "three hundred ninety-six million, three hundred forty thousand, four hundred eighty-nine".