813290 has 16 divisors (see below), whose sum is σ = 1475712. Its totient is φ = 322704.

The previous prime is 813287. The next prime is 813299. The reversal of 813290 is 92318.

813290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×813290² = 1322881248200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (92232).

2⁸¹³²⁹⁰ is an apocalyptic number.

813290 is a deficient number, since it is larger than the sum of its proper divisors (662422).

813290 is a wasteful number, since it uses less digits than its factorization.

813290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 813290 is about 901.8259255533. The cubic root of 813290 is about 93.3430120348.

The spelling of 813290 in words is "eight hundred thirteen thousand, two hundred ninety".