396557 has 6 divisors (see below), whose sum is σ = 461358. Its totient is φ = 339864.

The previous prime is 396547. The next prime is 396563. The reversal of 396557 is 755693.

It can be written as a sum of positive squares in only one way, i.e., 329476 + 67081 = 574^2 + 259^2 .

It is not a de Polignac number, because 396557 - 2⁴ = 396541 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3998 + ... + 4095.

It is an arithmetic number, because the mean of its divisors is an integer number (76893).

2³⁹⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

396557 is a deficient number, since it is larger than the sum of its proper divisors (64801).

396557 is an equidigital number, since it uses as much as digits as its factorization.

396557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8107 (or 8100 counting only the distinct ones).

The product of its digits is 28350, while the sum is 35.

The square root of 396557 is about 629.7277189389. The cubic root of 396557 is about 73.4686185005.

The spelling of 396557 in words is "three hundred ninety-six thousand, five hundred fifty-seven".