813616 has 20 divisors (see below), whose sum is σ = 1590424. Its totient is φ = 403200.

The previous prime is 813613. The next prime is 813623. The reversal of 813616 is 616318.

813616 is nontrivially palindromic in base 15.

813616 is a nontrivial repdigit in base 15.

It is a plaindrome in base 15.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813613) by changing a digit.

It is a nontrivial repunit in base 15.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3256 + ... + 3496.

2⁸¹³⁶¹⁶ is an apocalyptic number.

It is an amenable number.

813616 is a deficient number, since it is larger than the sum of its proper divisors (776808).

813616 is a wasteful number, since it uses less digits than its factorization.

813616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 454 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 813616 is about 902.0066518602. The cubic root of 813616 is about 93.3554822718.

The spelling of 813616 in words is "eight hundred thirteen thousand, six hundred sixteen".