813213390 has 64 divisors (see below), whose sum is σ = 2197850112. Its totient is φ = 190780800.

The previous prime is 813213367. The next prime is 813213391. The reversal of 813213390 is 93312318.

813213390 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 2×813213390² = 1322632035350584200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813213391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29517 + ... + 49976.

It is an arithmetic number, because the mean of its divisors is an integer number (34341408).

Almost surely, 2^813213390 is an apocalyptic number.

813213390 is an abundant number, since it is smaller than the sum of its proper divisors (1384636722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813213390 is a wasteful number, since it uses less digits than its factorization.

813213390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79545.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 813213390 is about 28516.8965702792. The cubic root of 813213390 is about 933.4008104560.

The spelling of 813213390 in words is "eight hundred thirteen million, two hundred thirteen thousand, three hundred ninety".