813146784 has 48 divisors (see below), whose sum is σ = 2227321152. Its totient is φ = 259263488.

The previous prime is 813146779. The next prime is 813146797. The reversal of 813146784 is 487641318.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×813146784² = 1322415384659085312, which contains 22 as substring.

It is an unprimeable number.

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, 181929 + ... + 186344.

It is an arithmetic number, because the mean of its divisors is an integer number (46402524).

Almost surely, 2^813146784 is an apocalyptic number.

It is an amenable number.

813146784 is an abundant number, since it is smaller than the sum of its proper divisors (1414174368).

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

813146784 is a wasteful number, since it uses less digits than its factorization.

813146784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368309 (or 368301 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 813146784 is about 28515.7287124141. The cubic root of 813146784 is about 933.3753264553.

The spelling of 813146784 in words is "eight hundred thirteen million, one hundred forty-six thousand, seven hundred eighty-four".