396428621 has 8 divisors (see below), whose sum is σ = 417931584. Its totient is φ = 375281280.

The previous prime is 396428609. The next prime is 396428657. The reversal of 396428621 is 126824693.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396428621 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 (396421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86615 + ... + 91076.

It is an arithmetic number, because the mean of its divisors is an integer number (52241448).

Almost surely, 2^396428621 is an apocalyptic number.

It is an amenable number.

396428621 is a deficient number, since it is larger than the sum of its proper divisors (21502963).

396428621 is a wasteful number, since it uses less digits than its factorization.

396428621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177811.

The product of its digits is 124416, while the sum is 41.

The square root of 396428621 is about 19910.5153373789. The cubic root of 396428621 is about 734.6068954723.

The spelling of 396428621 in words is "three hundred ninety-six million, four hundred twenty-eight thousand, six hundred twenty-one".