396046021 has 16 divisors (see below), whose sum is σ = 458625024. Its totient is φ = 334991664.

The previous prime is 396046003. The next prime is 396046061. The reversal of 396046021 is 120640693.

It is not a de Polignac number, because 396046021 - 2⁷ = 396045893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396046061) 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 15 ways as a sum of consecutive naturals, for example, 249396 + ... + 250978.

It is an arithmetic number, because the mean of its divisors is an integer number (28664064).

Almost surely, 2^396046021 is an apocalyptic number.

It is an amenable number.

396046021 is a deficient number, since it is larger than the sum of its proper divisors (62579003).

396046021 is a wasteful number, since it uses less digits than its factorization.

396046021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 396046021 is about 19900.9050296714. The cubic root of 396046021 is about 734.3704922035.

The spelling of 396046021 in words is "three hundred ninety-six million, forty-six thousand, twenty-one".